It was during World War II, when US had struck the Japanese cities of Hiroshima and Nagasaki with an atomic bomb. The bombing resulted in mass scale loss of human life and collateral damage. The after effects of the war are evident till date. However, US has not offered any sort of apology on the matter (barring Barrack Obama who was too indefinite in his act of contrition) and surely owes one to the people of Japan. Here is a list of top 10 reasons why the US must apologize to Japan for the Atomic Bomb incident.