Yet another case of asking permission. This was at a local air show, and a military society had a stand. This man was dressed, and equipped, as an American special forces soldier in Vietnam. He was very pleased to pose, and I took his address and sent him a few prints. You should always do this - it makes the next photographers job easier. The problem was the background, as there were hundreds of people about. We chose to use the side of the tent that they had erected. If necessary, or if really worth it, people may well be prepared to meet you at a suitable location to shoot with more satisfactory backgrounds.