ATK Will Webcast Conference Call On Its First Quarter Fiscal 2003 Financial Results.

Business Editors

MINNEAPOLIS--(BUSINESS WIRE)--August 5, 2002

ATK (Alliant Techsystems)(NYSE:ATK) will webcast its investor conference call on fiscal year 2003 first quarter financial results, which will be announced August 8 prior to the opening of the market. Conference call details are as follows:

This call is being webcast by CCBN and can be accessed at ATK's web site at www.atk.com, Investor Relations page. Information about downloading Windows Media Player software, which is required to access the webcast, will be available on the website.

When:   10:00 a.m. Eastern Daylight Time, Thursday August 8.

Who:    Paul David Miller, chairman and chief executive officer
        Eric Rangen, vice president and chief financial officer
        Mark Mele, vice president, corporate strategy and
          investor relations
        Steve Wold, director, investor relations

Telephone recording: For those who cannot participate in the live webcast, a telephone recording of the conference call will be available. The telephone number is 719-457-0820, and the confirmation code is 591402. The recording will be available for one month after the call.

Institutional investors can access the call via CCBN's password-protected event management site, StreetEvents (www.streetevents.com).

ATK is a $2 billion aerospace and defense company with leading positions in propulsion, composite structures, munitions, and precision capabilities. The company, which is headquartered in Edina, Minn., employs approximately 11,300 people and has three business groups: Aerospace, Precision Systems, and Ammunition. ATK news and information can be found on the Internet at www.atk.com.