the failed repair was an inflight loss of pitch control, without which Walton could not control the aircraft's altitude. Shortly before his death, Forbes magazine had estimated Walton's net worth to be billion, tied with his brother Jim as the 4th richest person in the United States and 11th-richest person in the world. Walton was survived by his wife Christy and their son Lukas. He was previously married to Mary Ann Gunn, who later became a judge in Arkansas. He had two brothers, S. Robson Walton and Jim Walton and a sister, Alice Walton. See also Forbes list of billionaires (2004) Walton family References External links Forbes.com: Forbes World's Richest People 2004 Genealogy of the Walton family 1946 births 2005 deaths Accidental deaths in Wyoming American businesspeople in retailing United States Army personnel of the Vietnam War Aviators killed in aviation accidents or incidents in the United States College of Wooster alumni People from Newport, Arkansas Bentonville High School alumni People from Bentonville, Arkansas Recipients of the Silver Star Members of the United States Army Special Forces John T. Businesspeople from Arkansas Businesspeople from Wyoming 20th-century American philanthropists United States Army soldiers 20th-century American businesspeople Victims of aviation accidents or incidents in 2005