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ATK Propulsion and Composite Technologies Support Minotaur Launch of the NFIRE

MINNEAPOLIS, April 24 /PRNewswire-FirstCall/ -- Alliant Techsystems (NYSE: ATK) solid propulsion and composite technologies supported the successful launch yesterday of an Orbital Sciences Corporation Minotaur launch vehicle from Wallops Island, Virginia. The launch placed the Missile Defense Agency's experimental Near Field Infrared Experiment (NFIRE) spacecraft in orbit.

ATK supplied the Orion 50XL and Orion 38 motors that served as Minotaur's third and fourth stages, respectively. These stages are manufactured in its Salt Lake City facility. In addition to being used on Minotaur space launch vehicles that Orbital produces under the U.S. Air Force's Orbital/Suborbital program, Orion motors are used on their highly successful, Taurus XL® and air-launched Pegasus XL® vehicle.

ATK's Clearfield, Utah facility produced the 50" and 38" diameter composite cases for the second and third stage motors, and the composite interstage that joins the two. ATK's Flexseal assemblies also allow the rocket motor nozzle to change the angle of thrust for steering control while providing a critical seal between the rocket motor and the nozzle.

ATK is a $3.5 billion advanced weapon and space systems company employing approximately 15,500 people in 21 states. News and information can be found on the Internet at http://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, 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, please refer to ATK's most recent Annual Report on Form 10-K and any subsequent quarterly reports on Form 10-Q and current reports on Form 8-K filed with the U.S. Securities and Exchange Commission.

Media Contact:

George Torres
Phone: 801-251-2819
E-mail: george.torres@atk.com

Investor Contact:
Steve Wold
Phone: 952-351-3056
E-mail: steve.wold@atk.com



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