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This high-pitched noise may be responsible for a string of bizarre incidents and injuries.

Official contract document says using alternatives would put troops on the ground at "increased harm and risk."

Companies from around the world showed off armored vehicles, weapons, and other equipment at the annual gathering.

Retiring the Ticonderogas could exacerbate the dangerously unhealthy stress on the service's other warships.

The US Navy has sent out the final request for proposals and expects to pick a winning aircraft in September 2018.

The hydrogen fuel-powered SURUS could quietly carry cargo, rockets, a laser cannon, or more across the battlefield.

The so-called "independent post-boost vehicles" could be both more precise and difficult to shoot down.

So far, the Pentagon has offered few official details about a deadly ambush on American and Nigerien troops.

Amid reported arms deals, the first ever visit by a Saudi King to the Kremlin could signal a shift away from the US.

The service's little known fleet is important to operations around the world, but is sorely in need of new watercraft.

The unknown assailants reportedly killed a number of people in the patrol, possibly including a number of US troops.

The tactics are among those a recent US Army manual described in detail as an emerging and worrisome threat.

If true, it would be a significant political move by the Emirates, but it might just be a ploy to pressure the US.

The United States expects to deliver nearly 60 armed UH-60s as part of plans to transform the Afghan Air Force.

The new system is less than half the weight of the older equipment and shifts data onto the missiles much faster.

Budget cuts have left it with only one unmanned Coyote drone and a worryingly unreliable business jet to monitor storms.

Loss comes amid a surge of drone strikes against Al Qaeda terrorists in the war-torn country.

Iraqi Kurdistan's neighbors have rushed to block the independence push, while the US and others downplay the situation.

Spat between Bombardier and Boeing has Canadian officials scrounging abroad for second-hand F/A-18s.

The service has an "urgent" plan to install Israel's Trophy active protection system on at least some of its tanks.