Ernst Hanfstaengl was born in 1887 to German and American parents. He was educated at Harvard, but eventually moved to Germany, where he met a young Hitler at the very beginning of his political rise. After turning down Hitler's invitation to continue as his foreign press secretary, he returned to the United States, where he worked with the American government against the Nazi regime. He died in 1975.
John Toland was an American author and historian best known for his Adolph Hitler: The Definitive Biography and
The Rising Sun: The Decline and Fall of the Japanese Empire 1936–1945,
for which he won the Pulitzer Prize. He died in 2004.