Table 1,, Incidents Against Aviation by Category: 1996–2000,, ,,Number of ,Category,incidents ,Hijackings,64 ,Airport attacks,30 ,Off-airport facility attacks,13 ,Attacks on general aviation,13 ,Commandeerings1,13 ,Shootings at aircraft,10 ,Bombings,3 "1 Unlike a hijacking, which occurs in flight, a commandeering occurs when the aircraft is on the ground.",, "SOURCE: U.S. Department of Transportation, Federal Aviation Administration, Associate Administrator for Civil Aviation Security, personal communication, Apr. 18, 2001. ",,