NORRISTOWN, PA (AP) -- The mother of a 14-year-old who authorities say had a cache of guns, knives and explosive devices in his bedroom for a possible school attack was charged Friday with buying her son three weapons. Michele Cossey, 46, bought her home-schooled son, Dillon, a .22-caliber handgun, a .22-caliber rifle and a 9 mm semiautomatic rifle, authorities said. The teenager felt bullied and tried to recruit another boy for a possible attack at Plymouth Whitemarsh High School, authorities said. His mother was not accused of helping plot an attack, "but by virtue of her indulgence, she enabled him to get in this position," Montgomery County District Attorney Bruce L. Castor Jr. said. "This is not the best parenting I've ever seen and she needs to be held accountable," Castor said. Acting on a tip from a high school student and his father, police on Wednesday found the rifle, about 30 air-powered guns, swords, knives, a bomb-making book, videos of the 1999 Columbine...