Six months. 28 mass killings in the US. That's the worst yet, and all but one case involved guns

NEW YORK (AP) — Slain at the hands of strangers or gunned down by loved ones. Massacred in small towns, in big cities, inside their own homes or outside in broad daylight. This year's unrelenting bloodshed across the U.S. has led to the grimmest of milestones: The deadliest six months of mass...