Lt. General Vernon A. Walters, a military attaché of Dwight Eisenhower and later military attaché in France from 1967 to 1973, noted the strong relationship between de Gaulle and Eisenhower, de Gaulle's unconditional support of Eisenhower during the U-2 incident, and de Gaulle's strong support of John F. Kennedy during the Cuban Missile Crisis. Thus Walters was intensely curious as to the great contrast between de Gaulle's close relations with two United States presidents during notable Cold War crises and de Gaulle's later decision to withdraw France from NATO's military command, and Walters spoke with many close military and political aides of de Gaulle.