Nathan Followill, LeBron James, Nikki Sixx and More React to Colorado Shooting

Gunman killed 12, injured dozens at midnight screening of 'The Dark Knight Rises'

After news broke that a gunman opened fire at a screening of The Dark Knight Rises in Aurora, Colo., killing 12 and injuring at least 38, celebrities from Kings of Leon's Nathan Followill to actor Chris Evans took to twitter with reactions to the news. Rolling Stone has gathered their tweets below.