'Horrifying': Man hijacks plane and stabs passengers before being shot dead / US national shot dead during plane hijacking attempt in Belize / Belize plane hijacking: Knife wielding attacker shot dead after trying to take over flight / 'Hijacked plane was like a cold, dark tunnel' / Heroism, bravery displayed on 9/11 by plane passengers who made phone calls from hijacked aircraft / Hijacking attempt on Israel-linked ship thwarted by U.S. Navy