ATK Minnesota Headquarters, Minnesota

Until recently, when the corporate HQ was moved to Virginia, ATK was headquartered in this building in the suburbs of Minneapolis. ATK is a military products company that specializes in the full range of projectiles, from bullets to ballistic missiles. Also known as Alliant Tech Systems, they are the nation's largest manufacturer of rocket motors, used to propel ground-based missiles, as well as space entry and re-entry vehicles, after acquiring Thiokol. Their plant in Missouri makes more than 95% of the bullets used by the defense department in war, and in peace.