F-16 fighter flights

F-16 fighter flights at Luke Air Force Base -- its largest training area for the jets -- after one of the planes crashed in the desert Friday. It was the fifth such accident at Luke since October.

F-16s will be inspected before they are cleared to fly again. Rider had been airborne for 20 minutes when he developed engine problems and turned back toward Luke. Witnesses said the plane was on fire. The last three F-16 crashes were also engine-related. Pilots fly more than 100, 000 sorties a year out of Luke.