Patrick Daniel Tillman Jr. (November 6, 1976 – April 22, 2004) was an American professional football player for the Arizona Cardinals of the National Football League (NFL) who left his sports career and enlisted in the United States Army in May 2002 in the aftermath of the September 11 attacks. His service in Iraq and Afghanistan, as well as his subsequent death, were the subject of national attention. This increased after it was revealed that he was killed by friendly fire. Wikipedia