FILE - In this Nov. 11, 1984 file photo, President Ronald Reagan signs the papers accepting the Vietnam Veterans Memorial for the United States government during ceremonies in Washington. With the President are: Jan Scruggs, President of the Memorial Fund, Interior Secretary William Clark and his wife, and Defense Secretary Caspar Weinberger. William P. Clark, who rose from campaign volunteer to one of President Ronald Reagan's most trusted advisers, has died. He was 81. Clark's son, Paul, said his father died Saturday Aug. 10, 2013 at his ranch home in Central California after a long battle with Parkinson's Disease. (AP Photo/Bob Daugherty, File)