Marine Corps Commandant Gen. Joseph Dunford Jr. testifies Thursday during his Senate Armed Services Committee confirmation hearing to become the chairman of the Joint Chiefs of Staff. Cliff Owen/AP hide caption

itoggle caption Cliff Owen/AP

On Friday, a Russian Soyuz rocket will send an unmanned cargo ship with more than 3 tons of food, water and fuel for astronauts aboard the International Space Station. Russian Federal Space Agency hide caption

itoggle caption Russian Federal Space Agency

Mikheil Saakashvili (center) is the former president of Georgia, which waged a brief war with Russia in 2008. Last month, Ukrainian President Petro Poroshenko (left) named Saakashvili the governor of Odessa, the port city in Ukraine, a country waging its own battle with Russia. The two are shown in Odessa on May 30. Mykola Lazarenko/Presidential Press Service Pool/AP hide caption

itoggle caption Mykola Lazarenko/Presidential Press Service Pool/AP

Serbian protesters hold a banner that reads: "Serbia-Russia, we don't need the European Commission" on March 21 in Belgrade. The marchers were from a Serbian nationalist organization opposed to the government, which has pursued closer ties with Western Europe. Darko Vojinovic/AP hide caption

itoggle caption Darko Vojinovic/AP

A soldier in the Russian army posed, rifle in hand, for a snapshot at a battlefield checkpoint. Simon Ostrovsky, at right, located the same spot in Vuhlehirsk, in Ukraine's Donetsk region. VICE News hide caption

itoggle caption VICE News

Unmanned observation towers, funded by the European Union, have sprouted recently along Poland's border with Russia. This one is located outside the sleepy Polish border village of Parkoszewo. Soraya Sarhaddi Nelson/NPR hide caption

itoggle caption Soraya Sarhaddi Nelson/NPR

U.S. Bradley fighting vehicles take part in a joint exercise with Georgia at a military base near Tbilisi. Bradleys would be deployed to NATO member states in Eastern Europe and the Baltics if a Pentagon proposal is approved. Zurab Kurtsikidze/EPA/Landov hide caption

itoggle caption Zurab Kurtsikidze/EPA/Landov

Russian President Vladimir Putin met Wednesday with Italian officials and Pope Francis, as the U.S. sought to encourage the Vatican to join the West in condemning Moscow's actions in Ukraine. Luca Bruno/AP hide caption

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President Obama drinks a beer as he sits between men dressed in traditional Bavarian clothes during a visit to the village of Kruen, southern Germany, on Sunday, prior to the G-7 summit. Markus Schreiber/AP hide caption

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Visitors check out the Soviet-era metro cars exhibited at the Partizanskaya subway station in Moscow, as part of festivities marking the subway system's 80th anniversary. Pavel Golovkin/AP hide caption

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A Proton-M rocket shown in 2013. The same type of rocket malfunctioned in mid-flight on Saturday and crashed over Siberia carrying a Mexican communications satellite. PHOTO ITAR-TASS/ITAR-TASS/Landov hide caption

itoggle caption PHOTO ITAR-TASS/ITAR-TASS/Landov

The new Russian Armata T-14 tank shown during the Victory Day military parade in the Red Square in Moscow, on Saturday. Yuri Kochetkov/EPA/Landov hide caption

itoggle caption Yuri Kochetkov/EPA/Landov

Russian military personnel march in Moscow's Red Square during a rehearsal Thursday for the Victory Day military parade that will take place Saturday to celebrate the 70th anniversary of the victory over Nazi Germany in World War II. Ivan Sekretarev/AP hide caption

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Helicopter belonging to the Netherlands participates in NATO's Dynamic Mongoose anti-submarine exercise in the North Sea, off the coast of Norway, on May 4, 2015. MARIT HOMMEDAL/AFP/Getty Images hide caption

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A Russian launch vehicle carrying the Progress M-27M cargo ship lifts off from the Baikonur cosmodrome in Kazakhstan on Tuesday. Fears mounted Wednesday that the unmanned cargo capsule was lost and may plunge back to Earth as ground control failed to gain control of the orbiting ship for a second day in a row. Roscosmos /EPA /Landov hide caption

itoggle caption Roscosmos /EPA /Landov