The international race to develop biological weapons during the 20th century, the challenges scientists faced, and the moral dilemmas posed by their eventual success.
After notorious revolutionary leader Pancho Villa's raid on Columbus, New Mexico, General John Pershing and his 150,000 man cavalry set out to get Villa.
During the Great Depression, Americans built the Hoover Dam, one of the greatest engineering works in history.
At the height of segregation, an unlikely alliance between a black medical genius and a white surgeon led to a pioneering medical breakthrough.
The worst epidemic in American history killed over 600,000 Americans during World War I.
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.
The tale of oil-seeking mavericks whose risk-taking, sweat and dreams changed an American industry.
With over a million already dead, heroic American soldiers and nurses served in the closing battles of World War I.
After 18 years of struggles, the Golden Gate Bridge opened on May 27, 1937.