Frederic de Hoffmann assisted Hungarian-American physicist Edward Teller in the development of the hydrogen bomb.
 Upon graduating, de Hoffmann was sent to Los Alamos National Laboratory where he assisted Edward Teller in the development of the Hydrogen bomb. 
Edward Teller (Hungarian: "TellerEde" ; January 15, 1908 September 9, 2003) was a Hungarian-American theoretical physicist who was born in Hungary, and is known colloquially as "the father of the hydrogen bomb", although he claimed he did not care for the title. 
