ATK Thiokol Propulsion, a division of Alliant Techsystems, and
IsoTruss Structures, Inc. today announced the signing of a memorandum of
understanding for collaboration on the analysis and distribution of composite
lattice structures for commercial and military products.

IsoTruss uses patented new geometric technology to create composite
structures with extremely high strength-to-weight ratios. The new agreement
will enable the two companies to provide application-specific solutions to
customers in the military, international aerospace industry and commercial
markets that rely on high-performance, lightweight structures.

“We’re excited to tap the technical expertise and worldwide business
operations that ATK brings,” said Christopher Derrington, CEO of IsoTruss.
“We hope that by jointly working together to meet the needs of our customers
and develop new applications for IsoTruss, we will enable ATK to enhance its
product offerings.”

ATK Thiokol Propulsion is the world’s leading supplier of solid-propellant
rocket motors. The company produces the largest solid rocket motors in the
world — the Space Shuttle reusable solid rocket motor and the Titan IVB solid
rocket motor upgrade. The company’s employees are specialists in the design
and analysis of materials and components for both ongoing programs and next-
generation technologies.

“This agreement benefits ATK in both the short and long term,” said Andy
Haaland, manager of Propulsion Technology Business Development at ATK Thiokol
Propulsion. “IsoTruss Structures brings us technical work and we will help
them with analysis to bring products to market. Developing new applications
and products will help us maintain a strong position in the industry.”

ATK will provide structural and complex composite analysis for IsoTruss,
facilitating advanced technology development programs to produce new
applications that could be utilized by IsoTruss.

IsoTruss Structures, Inc., headquartered in Brigham City, Utah,
manufactures composite lattice products that meet client-specific end-use
requirements as new and unique solutions where designers and engineers have
been limited by conventional materials. More information is available at .

ATK Thiokol Propulsion is also based in Brigham City. Its parent company,
ATK is a $2.2 billion aerospace and defense company with strong positions in
propulsion, composite structures, munitions, precision capabilities, and civil
and sporting ammunition. The company, which is headquartered in Edina, Minn.,
employs approximately 12,000 people and has three business groups: Aerospace,
Precision Systems, and Ammunition and Related Products. ATK news and
information can be found on the Internet at .

Safe Harbor Statement: Statements in this press release may contain
forward-looking statements based on management’s current expectations,
estimates and projections. Words such as “anticipates,” “intends,” “plans,”
“estimates,” variations of such words and similar expressions are intended to
identify such forward-looking statements. Forward-looking statements are
subject to risks and uncertainties, which could cause actual results to differ
materially from those projected or implied in the forward-looking statements.

For further information, please contact Christopher Derrington of IsoTruss
Structures, Inc., +1-435-695-2000, ; or Andy Haaland of ATK
Thiokol Propulsion, +1-435-863-6373, .