Published July 20, 2012
| Associated Press
AURORA, Colo. (AP) — A neuroscience graduate student in a gas mask barged into a crowded Denver-area theater during a midnight showing of the Batman movie on Friday, hurled a gas canister and then opened fire, killing 12 people and injuring at least 50 others in one of the deadliest mass shootings in recent U.S. history. When the smoke began to spread, some moviegoers thought it was a stunt that was part of the "The Dark Knight Rises," one of the most highly anticipated films of the summer. They saw a silhouette of a person in the haze near the screen, first pointing a gun at the crowd and then shooting.