Just saw this on Fox. The inflatable aluminum and cloth canopy over the Dalas Cowboy's practice field collapsed during a severe thunderstorm. There are many ambulances on scene, and at least 4 staffers have been taken to area hospitals. Among the injured is the Dallas Special team's Coach. The canopy collapsed while the afternoon session of Rookie Mini-camp was underway. It is not known at this time if any players are among the injured. Images showed players racing from under the collapsing bubble as beams and supports came crashing down. More information as it becomes available.