ATK Supports 35th Flight of NASA's Space Shuttle Discovery
Press Release Jun 2, 2008

ATK Motors Help Carry Japanese Components to International Space Station

MINNEAPOLIS, June 2 /PRNewswire-FirstCall/ -- Alliant Techsystems (NYSE: ATK) supported the successful launch of NASA's Space Shuttle Discovery today. The company's Reusable Solid Rocket Motors (RSRM) and Booster Separation Motors (BSM) performed as expected on the mission to transport the Kibo Japanese Experiment Module - Pressurized Module (JEM-PM) and the Japanese Remote Manipulator System (JEM-RMS) to the International Space Station (ISS).

ATK-manufactured RSRMs provided the main thrust at liftoff and carried the orbiter and its payload to an altitude of approximately 28 miles in two minutes of flight. The RSRMs produce the equivalent of 15 million in horsepower and have flown on every mission since the inception of the program in 1981.

After two minutes, eight BSMs - four on the forward skirt and four on the aft skirt on each booster - fired to jettison the RSRMs away from the orbiter and external tank, allowing the rocket motors to parachute back down through the Earth's atmosphere to be recovered and reused. ATK's BSMs will continue to be used in the forward location until later this year, when they will be used in the aft skirt as well.

The RSRMs and BSMs will be used for the remainder of the Space Shuttle program with upgraded versions being used on NASA's next-generation launch vehicle - Ares I. ATK is the prime contractor for the Ares I First Stage

STS-124 will carry the largest payload so far to the ISS and is the second of three Space Shuttle flights that will launch components to complete Japan's Kibo laboratory. The mission includes three spacewalks to install the new module and a remote manipulator system. The lab's logistics module, installed in a temporary location during January's STS-123 mission, is to be attached to the new lab. STS-124 is the 123rd Space Shuttle flight and the 26th U.S. flight to the ISS.

ATK is a premier aerospace and defense company with more than 17,000 employees in 21 states and $4.5 billion in revenue. News and information can be found on the Internet at http://www.atk.com/.

SOURCE: ATK Press Release 822

ATK Ultraflex Solar Arrays Deploy and Provide Critical Power to the Mars Phoenix Lander
Press Release May 26, 2008

ATK Solar Arrays, Thermal Technology, Diaphragm Tank and CoilABLE Boom Assist the Mars Phoenix Mission

MINNEAPOLIS, May 26 /PRNewswire-FirstCall/ -- Alliant Techsystems (NYSE: ATK) announces that the Ultraflex Solar Arrays deployed and now provide power to the Mars Phoenix Lander. This is the first flight for this unique solar array technology developed by ATK's Goleta, California facility. Each Ultraflex array unfolded like an oriental fan into a circular shape 2.1 meters in diameter and will generate 770 watts of power from sunlight at the distance Earth is from the sun. Since Mars is approximately 1.5 times farther from the sun, the solar arrays will produce less than half the power possible on Earth.

Launched in August 2007, the Phoenix Mars Mission is the first in NASA's Scout Program. Phoenix is designed to study the history of water and habitability potential in the Martian arctic's ice-rich soil.

Also on board the Phoenix Lander is a CoilABLE boom which will deploy the Surface Stereo Imager camera. At release, strain energy stored in the stowed, coiled boom structure lifts the camera payload, weighing 4.5 times the weight of the boom, to a height about 27 inches above the lander deck. The deployed structure is a straight, three-sided truss capable of supporting the camera even if the lander is tilted on a 21 degree slope after landing. This boom design shares heritage with the boom which deployed a similar camera on the Mars Pathfinder lander in 1997.

In addition ATK produced both a Dual Bore Heat Pipe Assembly and a diaphragm tank to support the Phoenix Mars Lander Program. The Dual Bore Heat Pipe contained complex mechanical bending configurations and efficient heat transport and conductance capability that supported the heat removal from the Cruise Stage electronics to the Cruise Stage radiator. ATK is proud to supply so many critical pieces of this important NASA mission.

ATK is a premier aerospace and defense company with more than 17,000 employees in 21 states and $4.5 billion in revenue. 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.

SOURCE: ATK Press Release 821

ATK Receives Additional $89 Million in Military Small-Caliber Ammunition Orders and Modernization Funding
May 21, 2008

Orders Reaffirm ATK's Projection to Deliver 1.4 Billion Military Small-Caliber Rounds in FY09

Minneapolis, May 21 /PRNewswire-FirstCall/ -- Alliant Techsystems (NYSE: ATK), the largest supplier of ammunition to the United States military, has received an additional $89 million in military small-caliber ammunition orders and modernization funding from the U.S. Army Sustainment Command in Rock Island, Ill. Work on the contracts will be performed by ATK at the Lake City Army Ammunition Plant (LCAAP), Independence, Missouri. The Army has awarded ATK $72 million for small-caliber ammunition. The remainder of the funds will be devoted to various plant modernization projects.

ATK operates the U.S. Army's LCAAP where it produces a mix of 5.56mm, 7.62mm, .50-caliber and 20mm cartridges. Working in partnership with the Army, ATK has expanded manufacturing capacity at the plant to 1.6 billion rounds. ATK began operating the plant in 2000, and is now under contract to modernize the facility, which has remained largely unchanged from the plant's groundbreaking in 1940.

"We are pleased with the contract awards and maintain our high-level commitment to produce quality ammunition," said ATK Armament Systems President Mark DeYoung. "We are grateful for the opportunity to continue delivering performance and survivability solutions to our nation's defenders."

ATK is a premier aerospace and defense company with more than 17,000 employees in 21 states and $4.5 billion in revenue. 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.

SOURCE: ATK Press Release 821