Obama said that "71 years ago on a bright, cloudless morning, death fell from the sky and the world was changed."
"A flash of light and a wall of fire destroyed a city, and demonstrated that mankind possessed the means to destroy itself," the President added during his address at the site of the first nuclear bombing.
Obama was not expected to apologize for the U.S. action to hasten the end of World War II and he did not during his 20-minute-long remarks.
