It took a little luck for Axelrad to reunite Hung with his amputated arm. He travelled to Vietnam last summer - partly for a holiday, but also to try to find the man.
He said he wasn't sure Hung was still alive, or where to begin looking for him.
By chance, Axelrad toured the old Vietnam War bunker at the Metropole Hotel in downtown Hanoi.
His tour guide was Tran Quynh Hoa, a Vietnamese journalist who took a keen interest in his war stories.
