An Iraqi man, detained by the U.S. military, comforts his four-year-old son near An Najaf on March 31, 2003. The man was seized in An Najaf with his son and the U.S. military did not want to separate the pair. (Jean-Marc Bouju/Associated Press)

From Saddam Hussein's capture to the Abu Ghraib prison scandal, these dramatic pictures have marked five years of conflict in Iraq.