While the Pentagon acknowledged years ago that it used American servicemen in World War II mustard gas experiments, NPR found new details about tests that grouped subjects by the color of their skin.

In the shadows of World War II, Japan built a secret unit that turned human beings into test subjects. Unit 731’s story is one of horror, cruelty, and silence.

The release of WWII-era military documents this year has given a boost to researchers digging into Japan's germ warfare program. Japan's government has never apologized for the atrocities.

At the height of World War II, scientists from Harvard conducted secret military medical experiments at the Norfolk State Prison Colony. It’s one of the many forgotten stories from the prison ...

TOKYO - Japan is starting to excavate the site of a former medical school that may reveal grisly secrets from World War II. The investigation begins Monday at the former school linked to Unit 731 ...

Archaeologists found a bunker used by WWII Japanese scientists to conduct human experiments, says a report. They say the site could provide new evidence about war crimes committed by the notorious ...