The epidemic actually started in the 1960s, with 2 in 1968 and 5 in 1969. Before that there had only been one every few years. Starting in 1970, there were at

The epidemic actually started in the 1960s, with 2 in 1968 and 5 in 1969. Before that there had only been one every few years. Starting in 1970, there were at least 44 air hijackings worldwide over the next decade, over half of them before 1973.