911 calls after Ind. stage collapse released

For the first time, the public is hearing emergency calls on the night of a deadly stage collapse at the Indiana state fair.

Dispatcher: "Go ahead.
Caller: The stage has collapsed. The grandstands are gone.
Dispatcher: I'm calling a mass casualty."

A recording of dispatch radio calls that night, August 13, shows emergency workers were concerned about the severe weather before the disaster.

Fair officials have said they were preparing to order an evacuation when the stage rigging collapsed into the grandstands. Seven people died.