A meteor exploded over Pittsburgh. It was equivalent to 30 tons of TNT, NASA said.
The bolide — a meteor brighter than Venus — is believed to have weighed about 1,000 pounds and shot through the atmosphere at 45,000 mph, NASA says.

The bolide — a meteor brighter than Venus — is believed to have weighed about 1,000 pounds and shot through the atmosphere at 45,000 mph, NASA says.