Twenty years on, first-hand evidence recounting one of the most humiliating episodes in American history. In the final hours of defeat by North Vietnam in 1975, the USA staged a massive helicopter evacuation, fleeing South Vietnam having lost their most important engagement since the Second World War. The human interest series relives the withdrawal through eye-witness testimony from those at the US Embassy, in the cockpits, at the White House, in the streets of Saigon and also from the forgotten South Vietnamese left to face 300,000 North Vietnamese troops.