Today marks 80 years since the US dropped the first atomic bomb on the Japanese city of Hiroshima.

More than 140,000 people died – tens of thousands instantaneously – with 70,000 perishing in a second bomb over Nagasaki three days later.

Yet as the world marks the anniversary, it seems that many of today's leaders have failed to learn the lessons of that terrible epoch-defining day.

What did the commentators say?

The memory of Hiroshima and Nagasaki seared itself "into the conscience of global leaders and the public", and "cast a long shadow over global efforts to contain nuclear arms", said Stephen Herzog, professor of the practice, Middlebury Institute of International Studies at Monterey, California, on The Conversation .

From the late 1960s onwards a series of landmark non-proli

See Full Page