More training for pilots on advanced simulators could help prevent crashes and save hundreds of lives, according to an analysis by USA Today. Many pilots today are trained on older simulators that can't effectively re-create the real behavior of aircraft during stalls, severe icing, upsets due to wind shear or wake encounters, and other extreme conditions, says a recent NTSB report. Loss of control was a factor in 73 percent of the 433 airline fatalities in the U.S. since 2000. (Note that the fatalities that occurred on Sept. 11, 2001, are not counted in accident statistics, since they resulted from a crime, not an accident.) Newer simulators created with research by the military and NASA are more effective, but there are no federal requirements for pilots to be trained on them.