U.S. Army servicemen chat during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628463

U.S. Army servicemen chat during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628462

U.S. Army servicemen chat during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628459

Ukrainian soldiers wash an APC during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628456

Ukrainian soldier stops an APC during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628453

Ukrainian soldiers repel from a helicopter during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628445

A Ukrainian soldier prepares to fire his grenade launcher during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628441

Ukrainian soldiers ride jump off their APC during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628436

Ukrainian soldiers ride atop their APC during the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 6, 2018. The Rapid Trident 2018 is multinational military exercises uniting Ukraine, United States, NATO member countries and states which have joined the alliance's Partnership for Peace cooperation program.

06.09.2018#5628435