Obama in Hiroshima calls for 'world without nuclear weapons'

Barack Obama on Friday became the first sitting U.S. president to visit Hiroshima.

While making remarks at the Japanese city's Peace Memorial Park, he called for a "world without nuclear weapons."

During his 20 minutes speaking, the president did not apologize for the United States' action to hasten the end of World War II. According to CNN, he had not been expected to.

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