BERLIN — Residents of a small German town struggled Wednesday to decipher the motives of a teenager who burst into his former high school and went on a shooting rampage, killing 15 people before taking his own life. Authorities said Tim Kretschmer, 17, entered the Albertville Realschule in the town of Winnenden about 9:30 a.m. Wednesday, wearing black clothes and carrying a semiautomatic pistol. They said he fatally shot 12 people there — all but one of them... (GunPolicy.org)