A 15-year-old boy was fatally shot and 10 other people wounded over a roughly six-hour span of gun violence in New York City on Monday. The mayhem stretched across Brooklyn, Manhattan, Queens and to Staten Island, ending at about 10:30 p.m. in East Harlem, when the teen and a 30-year-old man were shot on Lexington Ave. and E. 123rd St. The teen, who was shot in the chest, died on the scene, ...