STAFF Sergeant Kenneth Leavelle, USAF, 437th Aircraft Generation Squadron, Charleston Air Force Base, South Carolina, blocks in an aircraft at Naval Air Station Sigonella during Operation ENDURING FREEDOM. In response to the terrorist attacks on September 11, 2001 at the New York World Trade Center and the Pentagon, President George W. Bush initiated Operation ENDURING FREEDOM in support of the Global War on Terrorism (GWOT), fighting terrorism abroad