He later worked in concert with Zachary Fisher to create the Intrepid Sea-Air-Space Museum in New York City, United States.
Stern worked for True magazine under an assumed name where he wrote a series of articles about former Nazi Party official Otto Strasser, who formed the anti-Nazi Black Front and left Germany to escape Adolf Hitler.
Together with Fred Rosen, Stern entered Rome on June 3, 1944, one day before the American forces, under General Mark Wayne Clark, took control of the city from the retreating German Army.
[2] He stayed in Rome for the next 50 years, reporting on Sicilian mobster Lucky Luciano and other colorful characters from that period.
[3] These profiles were collected for his 1953 book No Innocence Abroad, which included details of the Holohan Murder Case, in which an American OSS agent in Italy behind enemy lines was killed in 1944 by his own men.
[4] After former Lt. Aldo Icardi was charged with perjury in August 1955 based on his testimony to a Congressional subcommittee about the circumstances of Holahan's death(case was dismissed by the Hon.
Keech), The New York Times credited Stern's investigations, in addition to efforts by Holahan's brother and those of U.S. and Italian authorities, in having the case pursued.