India, Aug. 6 -- The first nuclear weapon was used in August 1945, after World War II ended. Hiroshima Day is celebrated on August, 6 every year. Did you ever imagine how devastating the day was? This day is considered one of the darkest days in human's life. Hiroshima Day commemorates the day of August 1945, when an atomic bomb was dropped on the Japanese city of Hiroshima, and a few days later, another fell on the city of Nagasaki. More than 100,000 people, mostly civilians, were killed instantly and for years afterwards, from horrible burns and radiation sickness. Although nuclear weapons were not used against people after that, the USA conducted tests in the Pacific Ocean which involved nuclear and hydrogen bombs. This Day is an opportu...