On July 20, 2012, a gunman opened fire during the midnight premiere of "The Dark Knight Rises" in a Century theater in Aurora, Colorado, killing 12 people and injuring 70 others. The gunman, later identified as James Eagan Holmes, who was believed to be acting alone, entered the theater dressed in protective clothing, set off tactical grenades, then opened fire with multiple firearms on the theatergoers. Counting both fatalities and injuries, the attack was the largest mass shooting in terms of number of casualties in United States history at the time. The theater was reopened on January 17, 2013.