Four things to know about President Obama's visit to Hiroshima

When President Obama became the first sitting American president to visit Hiroshima, he made an emotional speech but didn't apologize for the USA dropping atomic bombs on Hiroshima and Nagasaki in August of 1945.

At least 140,000 people died in Hiroshima and another 74,000 three days later in the second bombing in Nagasaki.

No other USA president has set foot on the grounds of Hiroshima, although the city lives in infamy, not just because of the attack but also because of the effects to the populace post-attack due to radiation. "No one expects him to apologize - the gesture, the visit alone, is enough", said Matt Steckling, 25, a Chicago native who has lived in Hiroshima for about a year and a half.

And he didn't. He did recognize the tragedy. "They ask us to look inward, to take stock of who we are and what we might become", Obama said during his 20-minute speech.

"Among those nations like my own that hold nuclear stockpiles, we must have the courage to escape the logic of fear and pursue a world without them", the United States president said.

In a ceremony loaded with symbolism, the first sitting US President to visit the city met survivors of the fearsome attack that marked one of the final, terrifying chapters of World War II.

Sherman Gillums Jr., a Marine veteran and executive director of Paralyzed Veterans of America, described Obama's visits to Vietnam and Hiroshima as "bittersweet for many, particularly ahead of Memorial Day".

Following the remarks, Abe called Obama's visit courageous, and long-awaited. USA ambassador to Japan, Caroline Kennedy was also a part of the trip.

In an emotional moment afterward, Obama embraced and shook hands with survivors of the attack, which exposed humanity to risks the president has said the world must do far more to resolve.

Obama also went to the lobby of the peace museum to sign the guest book: "We have known the agony of war".

"He made the decision to end the war and save American lives, save Japanese lives, but he always regretted the loss of life in Hiroshima and Nagasaki", Clifton Daniel told CTV's Canada AM on Friday.

Obama stepped over to meet historian Shigeaki Mori, who worked to get the 12 American prisoners of war who were killed by the blast added to the memorial. He says his historic visit is a chance to reaffirm a commitment to pursuing the world where nuclear weapons are no longer necessary.

"The most important thing we can do is recognize what happened, and understand the frightful consequences of war", Frechette said.

The Chinese government suggested yesterday that the wartime atrocities committed by Japan on Chinese soil, notably in the city of Nanjing, deserved more attention than the bombing of Hiroshima. Abe also said it would help the suffering of survivors, and that he concurred with Obama's anti-nuclear sentiments. He then gave a plea that the world try to rid itself of nuclear weapons.

Obama was in Japan this week to attend the Group of Seven leaders' conference in Ise-Shima, about 300 miles away.

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