Physicist Hugh Bradner took these remarkable color home movies at Los Alamos during the Manhattan Project with informal permission from the U.S. Army. The films include images from inside the top-secret laboratory, and depict scientists leaving for the Trinity test. Bradner's movies also capture recreational activities scientists enjoyed during the Manhattan Project, including hiking, skiing, swimming, and horseback riding, as well as Bradner's wedding at the home of Dorothy McKibbin in Santa Fe.