D.B. Cooper - A crime immortalized by time
DB Cooper hijacked a Boeing 727 and disappeared out of the back of the aircraft after getting the flight crew to lower the rear stairs. The 727 now has an aerodynamically operated switch fitted to prevent this happening in flight - known to pilots as the Cooper Switch.

The Hijacking Of TWA Flight 847
In June 1985 TWA Flight 847 out of Athens to Rome was hijacked by Shiite Muslims.

The Japan Airlines Hijack Story
News coverage about the Air Nippon hijacking on 23 July 1999, plus details of previous Japanese hijackings.

Operation Jonathan / Raid on Entebbe
On June 27, 1976, Air France flight number AF 139 was hijacked by four terrorists. The subsequent rescue of the hostages at Entebbe was the subject of the film "Raid on Entebbe".

PreventingCrime.Org
An article looking at the efficacy of various airport security measures in reducing the incidence of hijacking.