In the first of five pieces by photographers talking about their award-winning work, David Turnley describes how he captured the image of a young US sergeant at the moment he learns that the body bag next to him contains the body of his friend, killed by "friendly fire".
The widely published photo became an iconic image of the 1991 Gulf war - a war in which media access was limited by Pentagon restrictions.
http://news.bbc.co.uk/1/hi/world/4290906.stm
