Investigators examined a debris-littered alley in South Korea while questions swirled over what led to the deaths of 154 people at a Halloween party.
Author: Ashley R. Williams and Cady Stanton, USA TODAY
Oregon Safeway worker tried to disarm gunman who fatally shot 2: What we know
Four mass shootings this weekend left 10 victims dead. In Bend, Oregon, police were seeking a motive after a gunman opened fire in a Safeway.