Claim: Leslie Groves directed the Manhattan Project when he was 57 years old.
Evidence: Lieutenant General Leslie Richard Groves Jr. -LRB- 17 August 1896 -- 13 July 1970 -RRB- was a United States Army Corps of Engineers officer who oversaw the construction of the Pentagon and directed the Manhattan Project , a top secret research project that developed the atomic bomb during World War II.
From 1942 to 1946 , the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers.