With over a million already dead, heroic American soldiers and nurses served in the closing battles of World War I. New mechanized weapons led to the bloodiest war of the 20th century.
A brilliant scientist, Oppenheimer was tasked with the development of the atomic bomb during World War II.
In the early 1830s, Texas, ruled by Mexico, held 20,000 U.S. settlers and 4,000 Mexican Tejanos, forcing residents to pick sides.
The U.S. government's response to the Holocaust was slow and fueled by complex social and political factors.
A look at five real-life "Rosies," the reality of working in defense plants during World War II and then having to give up those jobs for returning GIs.
With the clock ticking and the city under fire how many could be saved?
An American Communist family that had fled to Moscow in the late 1920s, return to America in 1935 but can not bring their 5-year-old son.
A revealing portrait of one of America's most paradoxical leaders.
The U.S. and the Soviet Union race to build the hydrogen bomb during the Cold War, thus beginning the nuclear arms race.