“The difficult we do immediately. The impossible takes a little longer.”—Motto of the U.S. Army Corps of Engineers during World War II, according to The Home Book of American Quotations, ed. Bruce Bohle, p. 35 (1967), which says that other branches of the service also used this slogan. Newsweek, March 8, 1943, p. 34, attributes this “cocky slogan” to the Army Air Forces.