The rain and wind of summer storms have always been a bane for concertgoers at outdoor venues, but this summer things have taken a dangerous, sometimes deadly turn. A stage collapse Saturday at the Indiana State Fair killed five people and injured dozens. A strong wind gust sent steel rigging careening into the crowd as the band Sugarland was about to take the stage. Investigators are looking into the disaster to determine the cause. In this week's Arts File, Kerry Nolan speaks with NPR reporter Joel Rose about who's supposed to inspect outdoor stages to prevent these tragedies in the first place.