More On North Atlantic Treaty Organization - NATO

Defense Secretary Mark Esper wants to boost the number of foreign nationals training alongside U.S. troops by 50%.

NATO's commander declined to say whether the missiles had made it to Ukraine's front lines yet.

Lawmakers will not allow the F-35As once destined for Turkey to be transferred unless that country gets rid of its S-400s.

Ten thousand Marines, sailors and NATO troops will be pitted against each other in a force-on-force battle in the Mojave...

NATO Supreme Allied Commander Gen. Tod Wolters said Thursday he backed sending more Javelin tank-killer missiles to Ukraine.

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

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

Incirlik has played a key role in air operations against the Islamic State in Iraq and Syria.

The U.S. Defense Department has given Turkey one last chance to cancel its planned order of the Russian-made S-400.