The U.S. Air Force said the cause of the crash, as well as the status of the pilot, is unknown at this time.

More than 1 million Facebook users have now signed up to storm Area 51 to "get them aliens."

McSally said she did not report being sexually assaulted because she did not trust the system, and she said she was ashamed and confused.

“Once a holder of a top secret security clearance, Monica Witt actively sought opportunities to undermine the United States and support the government of Iran — a country which poses a serious threat to our national security,” said FBI executive assistant director Jay Tabb.

Musk has security clearance because his company SpaceX provides satellite launch services to the U.S. government.

Russia's military has accused the U.S. Air Force of using banned white phosphorus bombs during air strikes in Syria's Deir ez-Zor province. 

Five decommissioned Alberta ambulances are headed to some of the world's poorest countries to help alleviate critical shortcomings in their healthcare systems.

A U.S. Air Force fighter jet intercepted a small general aviation aircraft flying near President Donald Trump's private golf club Saturday.

Four southern Alberta men have been confirmed dead after an overdue airplane was located Friday with no survivors.

A Russian jet flew within five feet of a U.S. Navy plane over the Black Sea.