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ATK Successfully Tests Full-scale Space Shuttle Motor

ATK Joins NASA in the Countdown for the Space Shuttle Return-to-flight

Feb 17, 2005

Minneapolis, February 17, 2005 – Alliant Techsystems (NYSE: ATK) tested a full-scale Reusable Solid Rocket Motor (RSRM) today in support of NASA’s Return to Flight program. Initial results indicate the test was completely successful. The test, conducted at ATK’s Promontory, Utah, facility, was designed to validate the performance of a mid-life rocket motor. Shuttle RSRMs are certified for flight for five years after the propellant is cast. This is the last scheduled test before the expected return to flight, which could occur as early as May 2005.

A total of 167 instrumentation channels were used to gather data in support of more than 30 test objectives. The motor fired for the expected duration of approximately two minutes. The data collected from the test will further validate motor lifespan and provide performance information not typically gained from standard static-fire tests that focus on qualifying new products and designs.

ATK is the nation’s only supplier of human-rated solid rocket motors for access to space. In addition to manufacturing the reusable Space Shuttle boosters, ATK is a leading supplier of solid propulsion for commercial, military and scientific missions.

ATK is a $2.4 billion advanced weapons and space systems company employing approximately 14,000 people in 23 states. News and information can be found on the Internet at www.atk.com.