ATK Technologies Support ULA's Atlas V Launch of OTV-3

            ATK Technologies Support ULA's Atlas V Launch of OTV-3

ATK Composite and Space Structures Support Launch Vehicle

PR Newswire

ARLINGTON, Va., Dec. 11, 2012

ARLINGTON, Va., Dec. 11, 2012 /PRNewswire/ -- ATK (NYSE: ATK) composite
technology supported the successful December 11 launch of a United Launch
Alliance Atlas V rocket from Cape Canaveral Air Force Station, Fla. The ULA
Atlas V rocket launched the U. S. Military's third Orbital Test Vehicle (OTV),
a prototype space plane. The OTV, also known as the X-37B, supports space
experimentation, risk reduction and concept of operations (CONOPS) development
for a long duration and reusable space vehicle technologies. The rocket flew
in the 501 vehicle configuration with a 5.4 meter fairing and a single-engine
Centaur upper stage, with no solid rocket boosters.

Using advanced fiber placement manufacturing techniques, ATK produced the
10-foot diameter composite heat shield that provides essential protection for
the first stage of the launch vehicle, the 10-foot diameter Centaur Interstage
Adapter (CISA) and the 18-foot diameter boat tail that connects the CISA to
the payload fairing. The parts were fabricated by ATK at its Iuka, Miss., and
Clearfield, Utah, facilities.

The Reaction Control System (RCS) propellant tank for the Atlas V rocket was
manufactured at ATK's Commerce, Calif. facility. This is the 34^th Atlas V
launch using ATK-built composite structures.

ATK is an aerospace, defense, and commercial products company with operations
in 21 states, Puerto Rico, and internationally. News and information can be
found on the Internet at

Media Contact:                  Investor Contact:
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