Cyber Defense Announces SA 60 Airship Featured on The Science Channel Friday, September 23, 2005.

ST. PETERSBURG, Fla. -- Cyber Defense Systems, Inc. (OTCBB:CYDF), a designer and developer of next generation unmanned aerial vehicles (UAV's), today announced that the recent SA 60 Airship demonstration in Toronto was featured on The Science Channel Friday September 23, 2005 at 8:00 PM EST. You can view the segment that also aired on Discovery Channel Canada at the link below under 'Hurricane Help From Above': http://www.exn.ca/dailyplanet/view.asp?date=9/13/2005

Billy Robinson, CEO of Cyber Defense commented: "The recent demonstration the SA 60 Airship was a success and we are delighted that the Discovery Channel has produced a segment that profiles the use of Airships. We were not only able to test new technology but were also able to demonstrate the advertising and marketing capabilities with the Airship being masked as a 60 foot soccer ball." Mr. Robinson continued, "The Company and its team members continue to progress towards the goal of reaching above the jet stream where we our airships would effectively be low earth orbit satellites."

The Discovery Channel segment featured the Airship inventor Hokan Colting showing the systems and flight characteristics of the SA 60. The program originally aired in Canada, mid September on the Discovery Channel of Canada.

ABOUT CYBER DEFENSE SYSTEMS

Cyber Defense Systems, Inc. is designing and building a new generation of UAV's. Cyber Defense is currently marketing the airships and their CyberBug(TM) UAV's to various branches of the U.S. government and U.S. allies as multi-use platform vehicles capable of deployment in surveillance and communication operations. Cyber Defense Systems, Inc. http://www.cduav.com (OTCBB: CYDF)

ABOUT TECHSPHERE SYSTEMS INTERNATIONAL

Techsphere Systems International, Inc., a wholly owned subsidiary of Cyber Defense is located in Atlanta and Columbus, GA, is the manufacturer of low, mid and high altitude airships. Together with their teaming companies, Techsphere will design and build unique airship platforms for use in many areas including surveillance, the military and wireless communications. The current spherical airship design holds the world altitude record at over 20,000 feet. http://www.techsphere.us

ABOUT PROXITY

Proxity, Inc. is a developmental holding company specializing in the deployment and marketing of security protection technology and government contract fulfillment. With 18,750,000 shares in CYDF, Proxity is a major shareholder. Proxity seeks to acquire and develop both internet based business opportunities and security technology. The Company plans to enter into developmental, teaming and exclusive and nonexclusive marketing and distribution agreements with products developed for Government, commercial, military and homeland defense areas. http://www.proxity.com. (PinkSheets:PRXT)

ABOUT 21ST CENTURY AIRSHIPS

21st Century Airships Inc., located in Newmarket, Ontario, Canada is a Research and Development company for lighter-than-air crafts. Founded in 1988, its objective is to improve traditional airship technology and develop modern airships for various applications. The company's R&D activities have resulted in a considerable number of significant inventions and patents. http://www.21stcenturyairships.com

ABOUT SIERRA NEVADA CORPORATION

Sierra Nevada Corporation (SNC) is a fast-growing research, development and manufacturing company that provides leading edge Intelligence, Surveillance, Reconnaissance and Network-centric communications technologies on multiple platforms ranging from soldier-based to small and large manned/unmanned aircraft. SNC also specializes in the design and production of defense electronics products in the fields of Instrumentation, Test and Training (ITT), Electronic Warfare (EW), Air Traffic Control and Automatic Landing Systems (ATCALS), Unmanned Air Vehicles (UAVs) and Command, Control, Communications, Computers, Networking (C4N). SNC is a $300M+ company with a corporate office based in Reno, Nevada and does business with all branches of the U.S. DoD, as well as with certain Government agencies. Sierra Nevada Corporation owns the SA-60 Airship that flew for the recent Navy test flights and holds the exclusive integration contract rights for government end users of Techsphere's airships. http://www.sncorp.com

About the Discovery Channel:

Over the last 20 years, the Discovery Channel has been described as "one of television's most valued and trusted networks," and it approaches its twentieth anniversary as the most widely distributed television brand in the world, reaching 450 million homes in over 160 countries.

This release contains statements that constitute forward-looking statements. These statements appear in a number of places in this release and include all statements that are not statements of historical fact regarding the intent, belief or current expectations of the Company, its directors or its officers with respect to, among other things: (i) the Company's financing plans; (ii) trends affecting the Company's financial condition or results of operations; (iii) the Company's growth strategy and operating strategy; and (iv) the declaration and payment of dividends. The words "may," "would," "will," "expect," "estimate," "anticipate," "believe," "intend," and similar expressions and variations thereof are intended to identify forward-looking statements. Investors are cautioned that any such forward-looking statements are not guarantees of future performance and involve risks and uncertainties, many of which are beyond the Company's ability to control and those actual results may differ materially from those projected in the forward-looking statements as a result of various factors.