Hiroshima-Nagasaki Bombing Videos
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.
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Dangers and implications of North Korea hydrogen bombABC 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.
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Dec. 6, 1998: 20/20: The mysterious case of the USS IndianapolisThe USS Indianapolis went down under enemy fire during World War II in one of the worst disasters in U.S. Naval history.
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Japan marks 72nd anniversary of atomic bombing of NagasakiA 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.
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White House reacts to North Korea missile threatABC 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.
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MOAB fallout from US Afghanistan strikeAfghan commandos assess the damage and search for information in the province that was attacked.
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NASA Spacecraft Set to Explore Giant Asteroid That Could Destroy EarthThe OSIRIS-REx Mission, headed by NASA and the University of Arizona, plan to launch an unmanned spacecraft on September 8 in the efforts to reach Bennu, a large near-Earth asteroid in August 2018, according to a website devoted to the mission.
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This Week in History: July 31-August 6ABC News' Jonathan Karl looks back at great moments in history, politics and pop culture.
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President Obama Hugs Survivor of Hiroshima BombingThe president visited the Hiroshima Peace Memorial to mourn the Japanese, Korean and American victims of the world's first atomic blast in World War II.
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President Obama Makes History in HiroshimaObama became the first sitting president to travel to Hiroshima since the U.S. dropped an atomic bomb there in 1945.