ATK (Alliant Techsystems) (NYSE:ATK) will webcast its investor conference call on
fiscal year 2003 second quarter financial results, which will be
announced October 31 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, October 31, 2002.

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 556161. 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 $2.1 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.

Contact:
ATK
Rod Bitz, 952/351-3063 (Media)
rod_bitz@atk.com
or
Steve Wold, 952/351-3056 (Investor Relations)
steve_wold@atk.com