21.   The piece of information suggested that al-Qaida terrorists might hijack an airplane in an attack that would target U.S. citizens.

22.   The stepped-up measures came after four airliners were hijacked by terrorists last week.

23.   They also warned it was possible terrorists could hijack the radioactive cargo.

24.   The ensuing civil war exploded onto the French mainland last Christmas when Islamic terrorists hijacked an Air France jet and held it under siege at Marseille airport.