Global Crossing Expands Global Portfolio of Security Solutions for Enterprises

Company Integrates Capabilities of Security Leaders HP ArcSight and Fortinet

FLORHAM PARK, New Jersey, May 17, 2011 - Global Crossing (NASDAQ: GLBC), a leading global IP solutions provider,
today announced Global Crossing Security Solutions, an enhanced portfolio of
security capabilities that allow customers to more easily and thoroughly
protect, manage and monitor enterprise networks.

The new suite of security features includes a firewall, intrusion
prevention service, web content filtering, and antivirus and anti-spam
capabilities, and provides reporting and analysis via Global Crossing's
award-winning uCommand(TM) customer portal. The company is using a new
Security Information and Event Management (SIEM) platform, which generates
the reports and posts them to the customer portal. The SIEM platform resides
in the Global Crossing Security Operations Center (SOC), where security
professionals, analysts and engineers monitor and assess customers' network
security. Located in Phoenix, Ariz., the global SOC provides around-the-clock
personal response to the security events of customers around the world.

Global Crossing customers also now have access to a full array of
professional services from Global Crossing Security Consulting. These
consulting services provide security assessments and audits, penetration
testing, and vulnerability evaluations. Global Crossing professionals also
review and create security policies and provide on-site incident response
services.

"As multinational enterprises face an ever-increasing number of security
threats to their networks, Global Crossing recognizes the need to address -
in a holistic manner - the entire spectrum of these potentially
revenue-impacting attacks," said Dave Carey, Global Crossing's chief
marketing officer. "Global Crossing Security Solutions cost-effectively
extends our customers' limited IT and security resources, and lets them
concentrate on their core business while we keep their networks hardened and
secure."

According to independent research firm Forrester Research, the estimated
size of the global managed security services market is about $4.5 billion,
which includes outsourced and software-as-a-service (SaaS) security services,
as well as annualized security operations.(1)

Global Crossing Security Solutions draws on the expertise and industry
leadership of two well-known security industry players: ArcSight, an HP
company, and Fortinet.

The company is using the ArcSight Enterprise Threat and Risk Management
platform to provide complete visibility across a customer's IT infrastructure
in order to proactively monitor and manage business risk. The ArcSight
platform includes the industry's leading SIEM products for collecting,
analyzing and assessing security and risk event information, and will provide
external reporting to Global Crossing customers via the company's
self-service portal, uCommand. Gartner Inc. has positioned ArcSight in the
Leaders quadrant of the analyst firm's 2010 report, "Magic Quadrant for
Security Information and Event Management (SIEM)."(2) Gartner examined 20
vendors for this report. Nine are point-solution vendors and 11 are vendors
that sell additional security or operations products and services that offer
wired or wireless service, or both.

FortiGate(R) appliances, developed by Fortinet, are deployed at customer
locations and enhance Global Crossing's ability to provide a fully managed
solution. Specifically, for the Global Crossing solution, the appliances
provide firewall, intrusion protection, application control, web content
filtering, and antivirus and anti-spam capabilities. The appliances send logs
of events on those activities to the ArcSight platform for analysis by
security operations center staff. Gartner Inc. has positioned Fortinet in the
Leaders quadrant of the analyst firm's report, "Magic Quadrant for Unified
Threat Management."(3) Gartner examined 13 companies that provide network
security, web security and email security software and/or hardware products.

Global Crossing's "Culture of Security," derived from its Network
Security Agreement with the United States government, plays heavily into its
ability to differentiate itself from its competitors. This comprehensive,
landmark agreement covers the areas of physical, logical, information, and
personnel security, and sets the bar higher for network security in the
telecommunications industry in several unique and important ways that benefit
Global Crossing's customers. Similarly, the Global Crossing IP VPN for the UK
Government has been evaluated to Evaluation Assurance Level 2. This process
provides independent and impartial testing, proving network security as well
as confidence and trust to subscribers.

Global Crossing's uCommand self-service portal is an integral component
of the company's customer experience initiative and a crucial resource that
supports the company's longstanding commitment to customer satisfaction. It
gives customers access to network management capabilities and services, and
real-time performance monitoring. Customers can manage network alarms and
interact with service delivery and assurance teams through a customized,
interactive map. The map gives customers circuit-by-circuit,
location-specific detail and allows them to drill down on network locations
to get more information, such as status of pending orders or trouble tickets,
or planned maintenance activities undertaken by Global Crossing.

(1) The Forrester Wave(TM): Managed Security Services, Q3 2010. Forrester
Research, Inc., August 10, 2010.

(2) Gartner. Inc., "2010 Magic Quadrant for Security Information and
Event Management (SIEM)" by Mark Nicolett and Kelly Kavanagh, May 13, 2010.

(3) Gartner, Inc., "Magic Quadrant for Unified Threat Management" by John
Pescatore and Bob Walder, Oct. 22, 2010.

About The Magic Quadrant

The Magic Quadrant is copyrighted 2010 by Gartner, Inc. and is reused
with permission. The Magic Quadrant is a graphical representation of a
marketplace at and for a specific time period. It depicts Gartner's analysis
of how certain vendors measure against criteria for that marketplace, as
defined by Gartner. Gartner does not endorse any vendor, product or service
depicted in the Magic Quadrant, and does not advise technology users to
select only those vendors placed in the "Leaders" quadrant. The Magic
Quadrant is intended solely as a research tool, and is not meant to be a
specific guide to action. Gartner disclaims all warranties, express or
implied, with respect to this research, including any warranties of
merchantability or fitness for a particular purpose.

ABOUT GLOBAL CROSSING

Global Crossing (NASDAQ: GLBC) is a leading global IP, Ethernet, data
center and video solutions provider with the world's first integrated global
IP-based network. The company offers a full range of data, voice,
collaboration, broadcast and media services delivered with superior customer
service.

Global Crossing provides services to enterprises (including approximately
40 percent of the Fortune 500); government departments and agencies; and 700
carriers, mobile operators and ISPs. It delivers converged IP services to
more than 700 cities in more than 70 countries, and has 17 world-class data
centers in major business centers around the globe.

Please visit www.globalcrossing.com for more information about
Global Crossing.

Website Access to Company Information

Global Crossing maintains a corporate website at
www.globalcrossing.com, and you can find additional information about
the company through the Investors pages on that website at
investors.globalcrossing.com. Global Crossing utilizes its website as
a channel of distribution of important information about the company. Global
Crossing routinely posts financial and other important information regarding
the company and its business, financial condition and operations on the
Investors web pages.

Visitors to the Investors web pages can view and print copies of Global
Crossing's SEC filings, including periodic and current reports on Forms 10-K,
10-Q, 8-K, and in respect of GCUK's Forms 20-F and 6-K, as soon as reasonably
practicable after those filings are made with the SEC. Copies of the charters
for each of the standing committees of Global Crossing's Board of Directors,
its Corporate Governance Guidelines, Ethics Policy, press releases and
analysts presentations are all available through the Investors web pages.

Please note that the information contained on any of Global Crossing's
websites is not incorporated by reference in, or considered to be a part of,
any document unless expressly incorporated by reference therein.

IMPORTANT INFORMATION FOR INVESTORS AND STOCKHOLDERS

This communication shall not constitute an offer to sell or the
solicitation of an offer to buy any securities or a solicitation of any vote
or approval. The proposed amalgamation between Level 3, Inc. ("Level 3") and
Global Crossing Limited ("Global Crossing") announced on April 11, 2011 will
be submitted to the stockholders of Level 3 and the stockholders of Global
Crossing for their consideration. Level 3 and Global Crossing will file a
registration statement on Form S-4, a joint proxy statement/prospectus and
other relevant documents concerning the proposed transaction with the SEC.
Level 3 and Global Crossing will each provide the final joint proxy
statement/prospectus to its respective stockholders. Investors and security
holders are urged to read the registration statement and the joint proxy
statement/prospectus and any other relevant documents filed with the SEC when
they become available, as well as any amendments or supplements to those
documents, because they will contain important information about Level 3,
Global Crossing and the proposed transaction. Investors and security holders
will be able to obtain a free copy of the registration statement and joint
proxy statement/prospectus, as well as other filings containing information
about Level 3 and Global Crossing free of charge at the SEC's Web Site at
www.sec.gov. In addition, the joint proxy statement/prospectus, the
SEC filings that will be incorporated by reference in the joint proxy
statement/prospectus and the other documents filed with the SEC by Level 3
may be obtained free of charge by directing such request to: Investor
Relations, Level 3, Inc., 1025 Eldorado Boulevard, Broomfield, Colorado 80021
or from Level 3's Investor Relations page on its corporate website at
www.level3.com/ and the joint proxy statement/prospectus, the SEC
filings that will be incorporated by reference in the joint proxy
statement/prospectus and the other documents filed with the SEC by Global
Crossing be obtained free of charge by directing such request to: Global
Crossing by telephone at +1-800-836-0342 or by submitting a request by e-mail
to glbc@globalcrossing.com or a written request to the Secretary, Wessex
House, 45 Reid Street, Hamilton HM12 Bermuda or from Global Crossing's
Investor Relations page on its corporate website at
www.globalcrossing.com.

Level 3, Global Crossing and their respective directors, executive
officers, and certain other members of management and employees may be deemed
to be participants in the solicitation of proxies in favor of the proposed
transactions from the stockholders of Level 3 and from the stockholders of
Global Crossing, respectively. Information about the directors and executive
officers of Level 3 is set forth in the proxy statement on Schedule 14A for
Level 3's 2011 Annual Meeting of Stockholders, which was filed with the SEC
on April 4, 2011 and information about the directors and executive officers
of Global Crossing is set forth in the proxy statement for Global Crossing's
2011 Annual General Meeting of Shareholders, which was filed with the SEC on
April 29, 2011. Additional information regarding participants in the proxy
solicitation may be obtained by reading the joint proxy statement/prospectus
regarding the proposed transaction when it becomes available.

This press release contains statements about expected future events and
financial results that are forward looking and subject to risks and
uncertainties that could cause the actual results to differ materially,
including: the failure to occur of any condition to the closing of the
acquisition of Global Crossing by Level 3 and uncertainties as to the timing
of the closing; the failure to achieve or any delay in achieving expected
synergies and other financial benefits from the acquisition; changes in
Global Crossing's risk profile resulting from the acquisition; limitations on
Global Crossing's financial and operational flexibility that arise under the
covenants in the amalgamation agreement that could restrict it from taking
advantage of opportunities to strategically enhance its business or improve
its capital structure; delays or reductions in purchases from Global Crossing
by customers because of their perceived uncertainty about its ability to meet
their needs after closing of the acquisition; disruptions in Global
Crossing's business due to current and prospective employees experiencing
uncertainty about their future roles with the company and the diversion of
their time and attention from ongoing business operations; Global Crossing's
history of substantial operating losses and the fact that, in the near term,
funds from operations will not satisfy cash requirements; the availability of
future borrowings in an amount sufficient to pay Global Crossing's
indebtedness and to fund its other liquidity needs; legal and contractual
restrictions on the inter-company transfer of funds by Global Crossing's
subsidiaries; Global Crossing's ability to continue to connect its network to
incumbent carriers' networks or maintain Internet peering arrangements on
favorable terms; the consequences of any inadvertent violation of Global
Crossing's Network Security Agreement with the U.S. Government; increased
competition and pricing pressures resulting from technology advances and
regulatory changes; competitive disadvantages relative to competitors with
superior resources; political, legal and other risks due to Global Crossing's
substantial international operations; risks associated with movements in
foreign currency exchange rates; risks related to restrictions on the
conversion of the Venezuelan bolivar into U.S. dollars and to the resultant
buildup of a material excess bolivar cash balance, which is carried on Global
Crossing's books at the official exchange rate, attributing to the bolivar a
value that is significantly greater than the value that would prevail on an
open market; potential weaknesses in internal controls of acquired
businesses, and difficulties in integrating internal controls of those
businesses with Global Crossing's own internal controls; exposure to
contingent liabilities; and other risks referenced from time to time in
Global Crossing's filings with the Securities and Exchange Commission. Global
Crossing undertakes no duty to update information contained in this press
release or in other public disclosures at any time.

    CONTACT GLOBAL CROSSING:
    Press Contacts
    Kate Rankin
    +1-973-937-0417
    Kate.Rankin@globalcrossing.com

    Michael Schneider
    UK and Europe Region
    +44-1270-534204
    Michael.Schneider@globalcrossing.com

    Paula Vivo
    Latin America
    +55-11-3957-2424
    Paula.Vivo@globalcrossing.com

    Analysts/Investors Contact
    Mark Gottlieb
    +1-800-836-0342
    glbc@globalcrossing.com

GEN/PR1

www.globalcrossing.com/enterprise/enterprise_security_solutions_landing.aspx

https://www.ucommand.com/

www.globalcrossing.com/network/network_security.aspx

www.globalcrossing.com/think_ahead/think_ahead_customer_experience.aspx

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