Three teens were among 13 people shot across Chicago Thursday.
Sun-Times file photo
A 17-year-old boy was among three people killed by gun violence in Chicago Thursday, and two 13-year-old boys were among 13 others wounded. One person was killed and three others wounded in a shooting in Gresham on the South Side. About 9:35 p.m., a man and a woman were standing outside in the 7900 block of South Lafayette Avenue when someone approached and opened fire,...