Los Alamos National Laboratory in New Mexico is one of three U.S. laboratories that design all U.S. nuclear weapons. LANL designed, produced and tested in New Mexico the two atomic bombs that were dropped on Japan in August 1945.

Los Alamos National Lab

Los Alamos National Laboratory (established as Los Alamos Scientific Laboratory by the MED in 1943; operated by the University of California since it was established; originally created to design and build a fission bomb; designated a national laboratory in 1977)