Armed security forces at a nuclear missile base failed a drill last summer that simulated the hostile takeover of a missile launch silo, according to an internal Air Force review obtained by The Associated Press. The review stated that forces were unable to speedily regain control of the captured nuclear weapon.  It also stated that the team failed to take “all lawful actions necessary to immediately regain control of nuclear weapons.”

Thirty-five countries pledged Tuesday to turn international guidelines on nuclear security into national laws, including France, Britain, Canada and Israel. This move is aimed at preventing terrorists from acquiring nuclear material. The initiative also commits countries to open up their security procedures to independent review – a further step toward creating an international legal framework to mitigate risks of nuclear terrorism.

Tactical-level errors during a small team exercise revealed discrepancies at the Malmstrom Air Force Base in Montana, marking the unit's entire inspection as a failure.

They did not swim in. Two goldfish have been found swimming in slightly radioactive water in a lemonade pitcher inside a secure area of the Perry nuclear power plant, Perry, Ohio.

Los Alamos nuclear research facility has replaced several components of switches made in China for the sake of security concerns. 

For FY 2013, the NNSA will lose 85 percent of its budget, and the megaport project -- set to scan shipping containers bound for the U.S. -- will be placed on hold.

After more than 7 years and $213 million, the new security system at Los Alamos National Laboratory is not functioning, and officials are debating how to divvy up the run-over costs.

A security lieutenant at New York’s Indian Point nuclear power complex has filed a lawsuit claiming the plant is unsecure.

The troubled San Onofre nuclear power plant in California has been slapped with a violation following a May security lapse. 

The new regulation will establish security requirements for risk-significant radioactive materials and shipments of small amounts of irradiated reactor fuel.