Colorado Gov. Jon Hickenlooper talks during a news conference at the Century 16 theatre east of the Aurora Mall in Aurora, Colo., on Friday, July 20, 2012. A gunman in a gas mask hurled a gas canister and opened fire in the sold-out theater during a midnight showing of the new Batman movie Friday. (AP Photo/David Zalubowski)

Photo by: David Zalubowski

Colorado Gov. Jon Hickenlooper talks during a news conference at the Century 16 theatre east of the Aurora Mall in Aurora, Colo., on Friday, July 20, 2012. A gunman in a gas mask hurled a gas canister and opened fire in the sold-out theater during a midnight showing of the new Batman movie Friday. (AP Photo/David Zalubowski)