 Harold Macmillan wrote in 1956 that he and others around him "thought of air warfare in 1938 rather as people think of nuclear war today".The most influential among the few who disagreed with such views was Hugh Dowding, who led RAF Fighter Command during the Battle of Britain.Others included American Major Claire Chennault, who argued against the so-called "Bomber Mafia" at the Air Corps Tactical School, and Lieutenant Benjamin S. Kelsey, Fighter Projects Officer for the United States Army Air Corps, responsible for specifying American fighters that were capable of downing bombers.