DEVELOPING: RENO, Nev. -- An airplane crashed Friday into a crowd attending an air race here, injuring dozens in what one event official described as a "mass-casualty situation." A medical official later said more than 75 people had been injured, including 25 critically. There was no official word on deaths, though one report put the toll as high as 12 and the crash near the grandstands left a horrific scene of bodies and wreckage.