Air Force Security Police and South Vietnamese soldiers guard the perimeter fence at Tan Son Nhut Air Base. Vietnam The aerial interdiction campaign against North Vietnam which began on 6 April 1972 with attacks in the southern part of the country expanded rapidly. On 16 April, B-52s, escorted by fighter and aircraft specializing in electronic … Continue reading B-52s Over Hanoi, 1972 – Operation Linebacker and the Christmas Bombing