ST. LOUIS (AP) — George Herbert Walker III, who was a cousin of two presidents, a former U.S. ambassador to Hungary and a prominent St. Louis businessman and philanthropist, has died. The church handling his memorial service says Walker died Saturday. A cause of death was not disclosed. He was 88. Walker was a cousin of presidents George Bush and George W. Bush. He served as ambassador to Hungary from 2003 to 2006. Walker was the longtime leader of a financial services company in St. Louis and was active in St. Louis betterment organizations. A memorial service will be Feb. 22.