General Lucius DuBignon Clay, Jr. (July 6, 1919 – February 7, 1994) was an American military leader who held the positions of commander-in-chief of the North American Air Defense Command, the Continental Air Defense Command, the United States element of NORAD, and was also a commander of the United States Air Force's Aerospace Defense Command (ADC). His father, Lucius D. Clay, Sr. and his brother, Frank Butner Clay, were also both generals, and his grandfather was Senator Alexander Stephens Clay of Georgia.