More On Allied Nations

"We have to always be concerned with this," the former defense secretary said.

Turkey was barred from the F-35 program after it decided to purchase the Russian S-400 missile.

Military leaders running the fight against ISIS in Iraq have agreed to stop flying planes, helicopters and drones there.

While the Pentagon agreed with the report's recommendations, the State Department balked.

Afghan ground controllers lack the ability to coordinate attack missions by the Afghan Air Force, according to the IG.

The Trump administration has confirmed that NATO ally Turkey will be removed from the F-35 Joint Strike Fighter program.

The U.S. military is not planning to participate in a recent United Arab Emirates-led exercise with Middle East partners.

The Arctic convoys would play an important role, especially in the critical months between July and December 1941.

President Donald Trump questioned the fairness of a decades-old defense agreement between the U.S. and Japan.