The anniversary of the first nuclear attack in Japan during the Second World War is celebrated as Hiroshima Day, named after the city that was attacked. It has been 71 years since the attack, which killed almost 1,40,000 people. To mark the day, people across the world remembered the victims with chants of "Hiroshima never again." 

On this day 71 years ago, the Enola Gay — a Boeing B-29 Superfortress bomber named after the mother of pilot Colonel Paul Tibbets -- flew over Hiroshima with "Little Boy." The Enola Gay as well as Tibeets went down in history as the first plane and pilot to carry out a nuclear attack. Tibbets, from Illinois, died in 2007 at the age of 92.  

The attack, and the subsequent one in Nagasaki in Japan, has left a deep scar in the memory of Japan and the world. U.S. President Barack Obama became the first president to visit the Hiroshima memorial on May 27, 2016, while in office.

"...In the image of a mushroom cloud that rose into these skies, we are most starkly reminded of humanity's core contradiction. How the very spark that marks us as a species, our thoughts, our imagination, our language, our toolmaking, our ability to set ourselves apart from nature and bend it to our will — those very things also give us the capacity for unmatched destruction," Obama had said. 

Apart from the Japanese city of Hiroshima remembering the fateful day, organisations like the Australian Red Cross, the Australian Greens Party and others condemned the use of nuclear weapons and called for a ban.