A piece of metal fell from a downtown Chicago building Thursday and struck a woman as she was walking by.CHICAGO (WLS) -- A piece of metal fell from a downtown Chicago building Thursday and struck a woman as she was walking by.The woman was walking down Michigan Avenue near Madison just before 1 p.m. Witnesses said the piece of metal hit the woman on her back.She was taken to the hospital.No other details are known at this time. Report a correction or typo