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Press Release

Citrix, Sierra Wireless, Verizon Wireless and Zumasys Help Red Cross Deliver Care during Memorial Day Tribute in Washington, D.C.

Third-Generation (3G) Wireless Solution Supports American Red Cross Operations, Accelerates Emergency Response

FORT LAUDERDALE, Fla., VANCOUVER, B.C., BEDMINSTER, N.J. and LAKE FOREST, Calif. - June 1, 2004 - Citrix Systems, Inc. (Nasdaq:CTXS), the global leader in access infrastructure solutions, Sierra Wireless (Nasdaq: SWIR - TSX: SW), a leader in delivering highly differentiated wireless solutions, Verizon Wireless, the nation's leading provider of wireless service, and Zumasys, Inc., a national solutions integrator, today announced that the American Red Cross of the National Capital Area (http://www.redcrossnca.org) used the four companies. combined mobile access capabilities to support Mass Care and Disaster Services during this weekend's dedication of the National World War II Memorial and related events in Washington D.C.

More than 140,000 visitors, including many elderly veterans, attended the World War II Memorial events. This kept the local Red Cross office busy, with staff members and volunteers staging water and first-aid supplies out of R.F.K. stadium and other sites to event locations during the weekend, providing medical treatment for visitors, and joining in other volunteer activities.

In addition to honoring the 16 million Americans who served in the U.S. armed forces during World War II, the Memorial Day ceremonies commemorated the sacrifice and heroism of millions more who contributed at home and traveled overseas to provide comfort, relief and aid to those in need. The American Red Cross has developed a special exhibit titled, "Volunteering for Victory," to educate the public about the unique and vital role that volunteers, donors and supporters of the organization played during the Second World War. The exhibit will be featured throughout the summer both at the Red Cross Museum in Washington, D.C., and through the virtual museum at www.redcross.org/museum.

The solution is part of a larger mobility trial being deployed by Zumasys for the Red Cross in both Washington D.C. and San Diego, Calif. to assist with day-to-day activities and emergency response. Zumasys provided PC5220 3G Wireless WAN PC Cards manufactured by Sierra Wireless for the Red Cross to use with its existing implementation of Citrix® MetaFrame® Presentation Server, enabling secure access from its laptops to applications via Verizon Wireless. BroadbandAccess service. Based on third-generation (3G), wide-area CDMA2000® 1xEV-DO technology, Verizon Wireless BroadbandAccess allows customers who are out of the office to access information at speeds of 300 to 500 kilobits per second, faster than those offered by any other commercially available wide-area wireless data service in the United States.

By using this mobile access solution, Red Cross staff and volunteers were able to wirelessly access Microsoft® Outlook for e-mail, the Red Cross' CHERS database of disaster victims, a Web-based expense card activation application for providing assistance to victims, and additional information housed in a FrontRange Solutions GoldMine® database. On-demand access to information led to better coordination of volunteers and supplies throughout the weekend. In addition, by enabling staff and volunteers to access and update data from the field, the joint mobile access solution accelerated emergency response time to spectators in need.

"This was an event of national significance, so it was critical that our staff had fast, wireless access to information from a number of different sites," said Jim Kiker, director of Information Technology for the American Red Cross of the National Capital Area. "With Zumasys' support, a mobile access solution from Citrix, Sierra Wireless, and Verizon Wireless BroadbandAccess, we were able to communicate via e-mail in the field, access our critical databases wirelessly and support more than 100,000 participants and visitors with thousands of supplies. As the Chapter IT director in support of communications at an event of this magnitude, it was comforting to know that - at all times - our Mass Care and Disaster Services officers had the information they needed at their fingertips."

About Citrix
Citrix Systems, Inc. (Nasdaq:CTXS) is the global leader in access infrastructure solutions and the most trusted name in secure access for enterprises and individuals. Nearly 50 million people in more than 120,000 organizations around the world use Citrix every day. Our software gives people secure and well-managed access to business information wherever it lives-on demand. Citrix customers include 100% of the Fortune 100 companies, 99% of the Fortune 500, and 92% of the Fortune Global 500. Based in Fort Lauderdale, Florida, Citrix has offices in 22 countries, and more than 7,000 channel and alliance partners in more than 100 countries. For more information visit http://www.citrix.com.

About Sierra Wireless
Sierra Wireless is a leader in delivering highly differentiated wireless solutions that enable our customers to improve their productivity and lifestyle. Sierra Wireless develops and markets Voq, a line of mobile phones with easy-to-use, secure software solutions for mobile professionals; AirCard, the industry-leading wireless PC card line for portable computers; embedded modules for OEM wireless applications; and the MP line of rugged vehicle-mounted connectivity solutions. For more information about Sierra Wireless, please visit http://www.sierrawireless.com.

About Verizon Wireless
Verizon Wireless is the nation's leading provider of wireless communications. The company has the largest nationwide wireless voice and data network and 39 million customers. Headquartered in Bedminster, NJ, Verizon Wireless is a joint venture of Verizon Communications (NYSE:VZ) and Vodafone (NYSE and LSE: VOD). Find more information on the Web at www.verizonwireless.com. To receive broadcast-quality video footage of Verizon Wireless operations, log onto www.thenewsmarket.com/verizonwireless.

About Zumasys
Zumasys specializes in architecting and implementing multi-vendor technology solutions that allow remote offices and mobile users to work together wirelessly, improving customer service and profitability. Zumasys applies its expertise with the Citrix MetaFrame Access Suite to create centralized application portals that are accessed over cellular-based mobile Internet connections (i.e. 3G Wireless). These wireless application portals ultimately lower costs, increase productivity and ease application deployment. For more information, visit http://www.zumasys.com.

This release contains forward-looking statements which are made pursuant to the safe harbor provisions of Section 21E of the Securities Exchange Act of 1934. The forward-looking statements in this release do not constitute guarantees of future performance. Those statements involve a number of factors that could cause actual results to differ materially, including risks associated with the company's business involving the company's products, their development and distribution, economic and competitive factors and the company's key strategic relationships and other risks detailed in the company's filings with the Securities and Exchange Commission. Citrix assumes no obligation to update any forward-looking information contained in this press release or with respect to the announcements described herein.

NOTE: This press release contains statements about expected future events and financial results related to Verizon Wireless that are forward-looking and subject to risks and uncertainties. For those statements, we claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. The following important factors could affect future results and could cause those results to differ materially from those expressed in the forward-looking statements: materially adverse changes in economic conditions in the markets served by us, an adverse change in the ratings afforded our debt securities or those of Verizon Communications by nationally accredited ratings organizations, the effects of the substantial competition that exists in our markets, which has been intensifying, and which may intensify further as a result of local number portability regulations that allow wireless customers to retain their phone numbers when switching wireless service providers, our ability to obtain sufficient financing to satisfy our substantial capital requirements, including to fund capital expenditures, debt repayment and distributions to our owners, our ability to obtain sufficient spectrum licenses, particularly in our most densely populated areas, our ability to develop future business opportunities, including wireless data services, and to continue to adapt to the changing conditions in the wireless industry, our ability to receive satisfactory service from our key vendors and suppliers, our ability to generate additional subscribers, with acceptable levels of churn, from resellers and distributors of our service, material changes in available technology, and technology substitution that could impact the popularity and usage of our technology, our continued provision of satisfactory service to our subscribers at an acceptable cost, in order to reduce churn, the impact of continued unionization efforts with respect to our employees, regulatory developments, including new regulations that could increase our cost of doing business or reduce demand for our services, developments in connection with existing or future litigation, and changes in our accounting assumptions that regulatory agencies, including the SEC, may require or that result from changes in the accounting rules or their application, which could result in an impact on earnings.

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Citrix® and MetaFrame® are registered trademarks or trademarks of Citrix Systems, Inc. in the U.S. and other countries. CDMA2000® is a registered trademark of the Telecommunications Industry Association (TIA USA). AirCard and Voq are trademarks of Sierra Wireless, Inc. Other product or service names mentioned herein may be the trademarks of their respective owners. Microsoft® is a registered trademark of Microsoft Corporation in the U.S. and/or other countries. All other trademarks and registered trademarks are property of their respective owners.