In 1967, Nguyen Quang Son was a six- month-old being cradled by his mother when an American bomb exploded nearby.

Hundreds of people died in the raid, but his mother was rescued and eventually taken to a clinic.

She had no idea what had happened to her son and after years of searching, the family gave him up for dead.

In 1980, they built a symbolic grave for him.

Unbeknown to them, the boy had been rescued by North Vietnamese soldiers and brought up by a nurse.

When Nguyen Quang Son discovered he was adopted at the age of 18, he began a long quest to find his parents.

He was able to build up a picture of what had happened by talking to war veterans, and eventually a resident near the battle site helped him identify his family.

They were reunited earlier this week after more than four decades.

The parents are certain the 40-year-old man who greeted them is their son, because he has a mark near his right eye that they remember, and looks like his brother and three sisters.

Source: bbc.co.uk