Hiroshima-Nagasaki Bombing News
AP Explains: Why Japan doesn't sign nuclear arms ban treaty
AP Explains: Japan, despite having suffered atomic bomb attacks, refuses to join nuclear powers and NATO in signing a nuclear ban treaty
US intelligence: 'Highly probable' North Korea tested hydrogen bomb
U.S. intelligence has assessed that it is “highly probable” that North Korea detonated a hydrogen bomb last weekend as it has claimed, according to a U.S. official. The blast was also assessed to have had an explosive yield of more than 140 kilotons, higher than initially believed, making it nearly
South Korea responds to North Korea's largest nuclear test
South Korea fired missiles into the sea to simulate an attack on the North's main nuclear test site.
Dangers and implications of North Korea hydrogen bomb
ABC News military analyst Steve Ganyard reports on the difference between atomic bombs tested by North Korea previously and the hydrogen bomb used in North Korea's most recently reported nuclear test.
What is a hydrogen bomb? A look at the latest potential threat from North Korea
North Korea's announcement on Sunday that it has successfully tested a hydrogen bomb meant to be loaded onto an intercontinental ballistic missile has raised alarm bells across the world, in part because of the weapon's destructive power. Here's a look at what a hydrogen bomb is, and what exactly
Dec. 6, 1998: 20/20: The mysterious case of the USS Indianapolis
The USS Indianapolis went down under enemy fire during World War II in one of the worst disasters in U.S. Naval history.
Japan marks 72nd anniversary of atomic bombing of Nagasaki
A peace ball rang out as hundreds took part in a memorial ceremony in Nagasaki on Wednesday to commemorate the day 72 years ago when the U.S. dropped an atomic bomb on the city, killing more than 150,000 people.
White House reacts to North Korea missile threat
ABC News' Cecilia Vega reports on President Trump's pledge of "fire and fury" in response to North Korea threats and new details of reported communications between Trump's legal team and Special Counsel Robert Mueller.
Hanford nuclear site incident raises questions about health, cancer risks
The breach of a tunnel that houses contaminated radioactive materials at the Hanford Nuclear Reservation has drawn attention to potential risks around nuclear radiation exposure , including cancer concerns long-cited in the surrounding community, which has dubbed the scar left behind following
MOAB fallout from US Afghanistan strike
Afghan commandos assess the damage and search for information in the province that was attacked.