Martin B-57 Canberra
"The deployment of actual combat capable B-57Bs from 8th and 13th Bomb Squadrons to Biên Hòa in August 1964 began with two aircraft lost and one damaged in collisions on arrival...An additional five aircraft were destroyed with another 15 damaged by a Viet Cong mortar attack in November of the same year.

On 16 May 1965, an armed B-57B exploded on the runway at Biên Hòa, setting off a chain reaction that destroyed 10 other Canberras..." (ed. note: Probably those shown here)
Source: http://en.wikipedia.org/wiki/Martin_B-57_Canberra