During World War II, more than a thousand women signed up to fly with the U.S. military as WASPS.
Major Walter Reed's discovery in 1900 that mosquitoes spread yellow fever halted an outbreak and led to the disease's eventual eradication.
The staggering death tolls of the Civil War permanently altered the character of the republic and the psyche of the American people.
"The Wizard of Menlo Park," Inventor Thomas Edison, built the first practical light bulb and revolutionized the world.
The most daring and innovative accomplishment at the turn of the 20th century.
Winner, 2010 Peabody Award --- The 1968 My Lai massacre, its subsequent cover-up, and the soldiers who broke ranks to bring the atrocity to light.
The U.S. and the Soviet Union race to build the hydrogen bomb during the Cold War, thus beginning the nuclear arms race.
The remarkable story of how a railroad was built connecting California to the East.