The last flight out of Uli

As Biafra collapsed its sole remaining airstrip at Uli became the only hope of escape and survival for what was left of the starving population. In desperation they all converged on this bomb battered 'dominion of hell itself' with the Nigerian army in hot pursuit. At 3 a.m. on the morning of January 11th 1970 the last aircraft at Uli was still trying to load frail orphans while under mortar and artillery fire. But who were they and why did they go back...?