No rise in mass killings, but have huge impact

The Associated PressMEMORIAL: In this July 21 photo, from left: Tylecia Amos, 14; Shatyra Amos, 15; Michael Walker, 17; and Mykia Walker, 16, carry flowers to lay at a makeshift memorial across the street from the Century Theater parking lot, in Aurora, Colo. Twelve people were killed when a gunman ...