For Fred Long, Chicago’s youth-focused nonprofit UCAN has been a ticket to a world that he never even knew existed growing up on the city’s South Side. Comment: If you think you don’t need a reminder about the conditions some kids face, think again and read this story. “As a little kid, my mom would be off doing drugs, and all of us would be left alone at home, hungry and without food,” he recalled. “We’d sit there looking down the street for her — that’s called ‘Window Pain.’ Or sometimes she’d take us on drug runs, where she’d go inside a