U.S. servicemen stand near the emblem of the of the Rapid Trident 2018 military drills during the opening ceremony at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5625059

Danish and Canadian servicemen salute during the opening ceremony Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5625051

Latvian servicemen stand at attention during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5625019

U.S. servicemen pose for a photo during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5625014

Polish servicemen smile during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5625012

U.S. servicemen stand at attention during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5625004

Bulgarian and Сanadian servicemen stand at attention during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5624991

U.S. servicemen stand at attention during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5624986

Ukraine serviceman stands near the armoured vehicle Kozak during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5624983

U.S. servicemen pose for a photo during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5624973

U.S. Ambassador to Ukraine Marie Yovanovitch attends the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5624965

Artists perform during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5624943

A head of the U.S. military contingent Colonel Tim Cleveland speaks during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5624923

U.S. servicemen stand at attention during the opening ceremony of the Rapid Trident 2018 military drills at the combat training ground outside the town of Yavoriv, Western Ukraine, September 3, 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.

03.09.2018#5624898