An 18-year-old man was stabbed during a fight Friday night inside a store in the Loop.The man was arguing with a group of people about 8:45 p.m. in a store in the 100 block of North State Street when someone in the group pulled out a knife and stabbed him in the back, Chicago police said.The man was taken in fair condition to Northwestern Memorial Hospital, police said.The group fled the scene, and no arrests were reported. ...read more read less