Authorities located a “possible biological laboratory" in a Las Vegas home on Saturday.

WASHINGTON – The Afghan man accused of shooting two National Guard soldiers blocks from the White House last week served with CIA-backed "zero units" in Afghanistan, paramilitary groups that carried ...

Add Yahoo as a preferred source to see more of our stories on Google. The United States used a secret new weapon during the raid that captured Venezuelan leader Nicolas Maduro earlier in January.

The U.S. military has conducted nearly a dozen secret operations against al-Qaida and other terrorist groups in Syria, Pakistan and other countries since 2004, The New York Times reported today.