<iframe src="http://www.npr.org/player/embed/157095862/157096100" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
Authorities in Aurora, Colo., say a gunman wearing a gas mask set off an unknown gas and fired into the crowded movie theater. Police are searching the suspect's apartment.
NPR thanks our sponsors
Become an NPR sponsor