There are currently 66 living recipients of the Medal of Honor, the U.S. military's highest decoration. Of the living recipients, one earned his Medal of Honor in World War II, three in the Korean War, 47 in the Vietnam War, 13 in the War in Afghanistan, one in the War in Iraq and one in Operation Inherent Resolve. One earned their medal while serving in the U.S. Air Force, 46 in the U.S. Army, 12 in the U.S. Marine Corps, and eight in the U.S. Navy. The oldest recipient is Hershel Williams, whereas the youngest is Kyle Carpenter. Three medal holders are still on active duty in the U.S. military, soldiers William D. Swenson, Thomas Payne and Matthew O. Williams of the U.S. Army. Among the recipients are former U.S. Senator Bob Kerrey and three are retired generals: Patrick Henry Brady and Robert F. Foley of the Army and James E. Livingston of the Marine Corps.