A senior U.S. defense official last week cast doubt on the national security value of proposed conventional weapons capable of hitting targets anywhere around the world on short notice.

USAF General Kevin Chilton, head of U.S. Strategic Command, argues that the current U.S. nuclear arsenal is in drastic need of a technological upgrade to ensure its reliability as the majority of the arsenal was built using technology from the 1950s.

The use of nuclear weapons will grow increasingly likely by 2025, US intelligence warned Thursday in a report on global trends that forecasts a tense, unstable world shadowed by war.

The election of Barack Obama as U.S. president has given crucial impetus toward implementing the Comprehensive Nuclear Test Ban Treaty more than a decade after it was negotiated, according to test ban officials.

In its first major act of defiance since Senator Barack Obama’s election, North Korea said Wednesday that it would bar international nuclear inspectors from taking soil and nuclear waste samples, which are considered crucial to determining the extent of its weapons program.

The Pentagon has a new secret weapon to neutralize sites containing chemical or biological weapons: rocket balls. These are hollow spheres, made of rubberized rocket fuel; when ignited, they propel themselves around at random at high speed, bouncing off the walls and breaking through doors, turning the entire building into an inferno.

An accident aboard a Russian nuclear attack submarine that killed at least 20 and injured 22 late Saturday, is the latest in a series of undersea tragedies that have struck the Russian Navy as it struggles to regain Soviet-era capacities.

The Israeli military is working on "a high-fly­ing, long-endurance unmanned in­frared sensor" that can tell the difference between nuclear war­heads amid doz­ens of decoys sent to confound na­tional missile defenses and would mark the first use of an unmanned platform for nuclear warhead hunting.

The approach of the next U.S. president has prompted calls from some prominent defense experts to work toward eliminating the nuclear arsenals held by the United States and other nations.

In advance of the election, some of Washington's most influential national security thinkers have argued for a dramatic shift in U.S. policy, to actively pursue the eventual elimination of all nuclear weapons from the Earth.