Les Aspin, American captain and politician, 18th United States Secretary of Defense (died 1995)

Leslie Aspin Jr. was an American Democratic Party politician and economist who served as the U.S. representative for Wisconsin's 1st congressional district from 1971 to 1993 and as the 18th United States Secretary of Defense under President Bill Clinton from 1993 to 1994.

The United States secretary of defense is the head of the United States Department of Defense (DoD), the executive department of the U.S. Armed Forces, and is a high-ranking member of the federal cabinet. The secretary of defense's position of command and authority over the military is second only to that of the president of the United States, who is the commander-in-chief. This position corresponds to what is generally known as a defense minister in many other countries. The president appoints the secretary of defense with the advice and consent of the Senate, and is by custom a member of the Cabinet and by law a member of the National Security Council.

July 21 is the 202nd day of the year in the Gregorian calendar; 163 days remain until the end of the year.