September 3, 2011: Kanye West closed down the inaugural "Call of Duty XP" convention, a two-day event celebrating the popular Activision Blizzard Inc. shoot-'em-up video game franchise, with an explosive concert inside a hangar on the old airfield where Howard Hughes built the Spruce Goose. West's performance included such hits as "Gold Digger" and "Love Lock Down." Saturday.