Nick Ut was born in march 29, 1951 in long An, Vietnam. Nick Ut started working for the Associated Press in November 1965, a few weeks after his brother, Huynh Thanh My, who was also working for the AP. His brother got killed by taking pictures during the Vietnam war.
Nick Ut basically took pictures during the Vietnam war to show people around the world what was happening there. All of his pictures are actually taken in black and white and that gave it more an dramatically effect.
research link http://famous-photographers.com/nick-ut/