ATK’s Total Contracted Backlog Now Exceeds $65 Million

MINNEAPOLIS, May 30 /PRNewswire-FirstCall/ — Alliant Techsystems (NYSE: ATK – News) is now under contract to provide more than $65 million of key components and subsystems to Northrop Grumman (NYSE: NOC – News) for the James Webb Space Telescope (JWST). The expanded scope and content now makes ATK one of the largest sub-contractors for this vital and historic scientific spacecraft. The company’s backlog on the JWST extends to 2009. The JWST is scheduled to launch no earlier than June 2013.

ATK will provide graphite fiber structures that support the science instrument Optical Bench and the 6.3-meter diameter primary mirror. In addition, the company provides thermal testing for composite structures that characterize material behavior across a wide spectrum of temperature differentials down to nearly 460 degrees below zero Fahrenheit.

“ATK is a leading developer of next-generation systems and subsystems technology for commercial space, scientific missions and military space,” said Ray Bronson, vice president and general manager, Space Systems and Sensors. “We look forward to the successful completion of our role on the James Webb Space Telescope.”

ATK is a $3.4 billion advanced weapon and space systems company employing approximately 15,000 people in 22 states. News and information can be found on the Internet at www.atk.com.

Certain information discussed in this press release constitutes forward- looking statements as defined in the Private Securities Litigation Reform Act of 1995. Although ATK believes that the expectations reflected in such forward-looking statements are based on reasonable assumptions, it can give no assurance that its expectations will be achieved. Forward-looking information is subject to certain risks, trends and uncertainties that could cause actual results to differ materially from those projected. Among those factors are: changes in governmental spending, continued funding for the JWST, budgetary policies and product sourcing strategies; the company’s competitive environment; the terms and timing of awards and contracts; and economic conditions. ATK undertakes no obligation to update any forward-looking statements. For further information on factors that could impact ATK, and statements contained herein, reference should be made to ATK’s filings with the Securities and Exchange Commission, including quarterly reports on Form 10-Q, current reports on Form 8-K, and ATK’s Annual Report on Form 10-K for the fiscal year ended March 31, 2005.