WWII in Europe had only ended a few months earlier when Overseas Airlines introduced the first commercial North Atlantic DC-4 service. Another first took place on March 7, 1946 when American Airlines introduced U.S. DC-4 domestic service between New York and Los Angeles. During the late 1940s and early 1950s the DC-4 and converted C-54s carried more passengers than any other four-engine transport. Amazingly many of these aircraft are still operating more than 60 years after they were first manufactured.