The Pentagon doesn't know. But it's the first such incident in nearly 10 years, suggesting that the Russian military is flexing its muscle.
Marines banned social networking sites from their computers Tuesday due to security concerns, and the Pentagon announced a policy review. But Pentagon's top officer will still tweet.
The Pentagon once took the unprecedented step of switching Capt. 'Scott' Speicher's status from 'killed in action' to 'missing-captured,' thinking he was alive.
More than 100,000 veterans have already been approved under the bill taking effect Saturday. Are campuses prepared?
Sgt. 1st Class Jared Monti was killed in a firefight in Afghanistan. He is the second service member to receive the military's highest honor for action in Afghanistan. But the award was given 246 times in Vietnam.
The 22,000 additional soldiers are expected to ease the transition from the war in Iraq to the one in Afghanistan.
Pfc. Bowe Bergdahl is only the second American service member taken hostage in Afghanistan since 2001. Soldier abductions have been rare in Iraq, too.
In a speech Thursday, the Defense secretary reiterated his determination to limit production of the F-22 stealth fighter. But lawmakers of both parties are fighting him.
A new study examined multiple deployments, enlistment policies, and exposure to intense combat as possible factors.
The head of the Missile Defense Agency suggests the plans could be altered, echoing President Obama's desire to compromise with Russia.
The service is putting more pilots behind a joystick to fly the unmanned planes crucial to today's wars.
As fighting intensifies in Afghanistan, July fatalities so far are higher than for all of June.
The deployment will include four brigades aimed at training and advising Iraqis – a nod to America's slow pullback from the front lines.
Command Sgt. Maj. Teresa King is first woman to head Army's only drill sergeant school.
Their numbers are small, but unit morale, cohesion, and discipline could be harmed.
The US government's official reason for shooting down the failed satellite last year doesn't fly, say some.
A Navy missle shot it down when it started to fall from the sky. But the cause of the satellite's failure is still unknown.
The vehicle saved soldiers in Iraq. Now it's getting a $2 billion makeover for Afghanistan.
Tracking North Korea's Kang Nam is not an extraordinary duty for American warships.