Workers cleared snow off the roof of Cowboys Stadium - site of the Super Bowl - on Saturday after ice and snow broke loose on Friday, injuring seven people. Arlington, Texas fire department crews also took part.
One of the private contractors was hit in the head, although no life threatening injuries were reported. The stadium closed off all entrances to the venue except for one, the NFL said. Officials placed a 100-foot perimeter around the stadium as work to clear the roof began Friday.