IN PICTURES: The Devastation in Hiroshima and Nagasaki, Now and Then

The world marks 70 years since that fateful day in August 1945 which left 140,000 people dead. Three days later, a second nuke killed 70,000, prompting Japan's surrender in World War II.

U.S. Army/Hiroshima Peace Memorial Museum/Handout via Reuters

The world marked the 70th anniversary of the atomic bombing of Hiroshima on Thursday with a ceremony near the epicenter of the 1945 attack on Japan.

The U.S. bomb, "Little Boy," the first nuclear weapon used in war, killed 140,000 people. A "black rain" of radioactive particles followed the blinding blast and fireball, and has been linked to higher rates of cancer and other radiation-related diseases among the survivors. A second bomb, "Fat Man," dropped over Nagasaki three days later, killed another 70,000, prompting Japan's surrender in World War II.

Here pictures of the devastation caused by those A-bombs in Japan, and what those sites look like today:

The Urakami Cathedral. Credit: Reuters
Nagasaki Medical College.
The Urakami Cathedral.
Nagasaki Medical College.
The Urakami Cathedral.
Hiroshima Prefectural Industrial Promotion Hall, currently called the A-Bomb Dome.
People on the Aioi Bridge in Hiroshima, with A-Bomb Dome in the background.
Local residents walking near Aioi Bridge in Hiroshima.