ATK Chairman and CEO Dan Murphy to Speak at Lehman Brothers 24th Annual Industrial Select Conference

MINNEAPOLIS, Feb. 2 /PRNewswire-FirstCall/ -- Alliant Techsystems (NYSE: ATK) will webcast the remarks of its Chairman and CEO, Mr. Dan Murphy, when he appears at the Lehman Brothers 24th Annual Industrial Select Conference on Wednesday, February 7, 2007. Mr. Murphy is scheduled to provide formal comments to the conference attendees beginning at 3:00 p.m. (EST). Access to the audio-only webcast will be available at http://www.atk.com/investorrelations/ . A replay of the webcast will be available on the company's website within 24 hours after the presentation and will remain on the site for 30 days.

    ATK is a $3.5 billion advanced weapon and space systems company employing
approximately 15,000 people in 21 states. News and information can be found at
http://www.atk.com/ .

    Media Contact:                    Investor Contact:

    Bryce Hallowell                   Steve Wold
    Phone:  952-351-3087              Phone:  952-351-3056
    E-mail: bryce.hallowell@atk.com   E-mail: steve.wold@atk.com