Pictures Midweek Music In Market Square Featuring The Pittsburgh Grand Prix July 16, 2014 / 3:57 PM EDT / CBS News Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix Midweek Music with Grand Prix