| Category | Number of 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.