New technology uses lasers to enrich uranium for nuclear power. Critics say it's approval would hamper nuclear weapons nonproliferation goals.
Mileposts in Iran's quest to harness nuclear power.
Funding for war in Afghanistan will eclipse Iraq for the first time in next year's budget.
The head of the Missile Defense Agency suggests the plans could be altered, echoing President Obama's desire to compromise with Russia.
Defense Secretary Gates, off to Singapore for a regional security summit, says US sees no 'crisis' in Pyongyang's 'very provocative' display of force this week.
Defense secretary applies lessons of Iraq, Afghanistan to new Pentagon budget.
US officials say the system is merely a protection against rogue states like Iran.
New leaders must better secure nuclear weapons after snafus led to firing of their predecessors.