Photo Gallery: Colorado theater shooting 19/42

A man drives up to Gateway High School where witness were brought for questioning after a gunman opened fire at the midnight premiere of The Dark Knight Rises Batman Movie Friday, July 20, 2012 in Aurora, Colo.   A gunman wearing a gas mask set off an unknown gas and fired into the crowded movie theater killing 12 people and injuring at least 50 others, authorities said.  (AP Photo/Barry Gutierrez) ORG XMIT: COBG115