Responding to his critics, President Barack Obama forcefully defended the nuclear agreement with Iran, declaring that the United States "cannot close the door on diplomacy."

On Sept 18, 1980, two airmen entered Launch Complex 374-7, an underground silo outside Damascus, Arkansas, to service a Titan II intercontinental ballistic missile.

Japan's hopes of fixing its nuclear leaks at Fukushima rest on an ambitious plan to build a 3.2km frozen underground wall.

Environmental columnist Sam Judd takes a look at the disastrous consequences of the Japan earthquake on our food chain.

ESR scientists are monitoring the Pacific for airborne radioactivity resulting from yesterday's underground nuclear test in North Korea.

A year on, Michael Dickison finds a Government keen to improve its world image while its citizens struggle on.