Japan’s Prime Minister Naoto Kan has taken his campaign against nuclear energy in Japan to Hiroshima, which became the world's first victim of an atomic bomb on August 6, 1945.

On the 66th anniversary of the world's first atomic bombing, people prayed for the victims during a ceremony at the Peace Memorial Park in Hiroshima.

Protesters also took to the streets as they marched at an anti-nuclear rally in Hiroshima, a city that has now started questioning its long embrace of nuclear energy's peaceful use, Reuters reported.

On August 9, 1945, Nagasaki in Japan became the world’s second city to have been attacked by atomic bomb.

Start the slideshow to view some old pictures of the bombing that shook Japan in 1945.