Hiroshima-Nagasaki Bombing Videos
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.
MOAB fallout from US Afghanistan strike
Afghan commandos assess the damage and search for information in the province that was attacked.
NASA Spacecraft Set to Explore Giant Asteroid That Could Destroy Earth
The 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.
This Week in History: July 31-August 6
ABC News' Jonathan Karl looks back at great moments in history, politics and pop culture.
President Obama Hugs Survivor of Hiroshima Bombing
The 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.
President Obama Makes History in Hiroshima
Obama became the first sitting president to travel to Hiroshima since the U.S. dropped an atomic bomb there in 1945.
President Obama in Hiroshima : 'Death Fell From the Sky'
After laying a wreath at the Hiroshima Peace Memorial, President Obama mourned the Japanese, Korean and American victims of the world's first atomic blast in World War II.
Obama Attends G-7 Summit
The President is in Japan with other world leaders to discuss terrorism, maritime security and the global economy.
Obama Wraps Up Vietnam Trip
President Obama connects with Vietnamese youth at a town hall meeting and listens to one young woman rap while he beat-boxed.