This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
Military reservist during decontamination activities at Chernobyl. Photo Credit: USFCRFC from IAEA Imagebank Flickr

Nuclear Reactor Accidents - History and Legacies

Nuclear power is controversial among governments, experts and the public. Three high-profile accidents contribute to public fear surrounding nuclear power.
The first large-scale nuclear reactor in history, the B-Reactor, in Hanford, Washington

Nuclear Reactors

A nuclear reactor is a device that initiates, moderates, and controls the output of a nuclear chain reaction.
Emblem of the Antarctic Treaty

Nuclear Weapon Free Zones and Denuclearization

This article discusses Nuclear Weapon Free Zones and other denuclearization agreements.

Nuclear Weapon Test Bans

This article summarizes multilateral and bilateral nuclear weapon test ban treaties.
Bikini Test

Operation Crossroads

Operation Crossroads was a series of nuclear weapons tests conducted by the United States at Bikini Atoll in the Marshall Islands in 1946.
Norsk Hydro's Vemork Plant Outside of Rjukan, Norway. Photo Credit: By Tor-Egil Farestveit (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons

Operation Gunnerside

On February 27, 1943, nine Norwegian commandos sabotaged the German-held Vemork plant outside of Rjukan, Norway. Operation Gunnerside successfully set-back Germany's atomic bomb program.
Shot Hood of Operation Plumbbob. Image courtesy of Los Alamos National Laboratory Archives.

Operation Plumbbob - 1957

Operation Plumbbob was a series of 29 nuclear tests conducted by the U.S. military between May 28 and October 7, 1957, at the Nevada Test Site.

Oppenheimer Security Hearing

In 1954, J. Robert Oppenheimer's security clearance was revoked by the Atomic Energy Commission.
B Reactor controls.

Peaceful Nuclear Innovations

Nuclear science has many peaceful implications for science and technology.