NATO Secretary General Jens Stoltenberg, second right, speaks with Ukraine's Defense Minister Stepan Poltorak, second left, during a meeting of the NATO-Ukraine Commission at NATO headquarters in Brussels on Thursday, June 25, 2015. NATO defense ministers meet for a second day of sessions to discuss, among other issues, the situation in Ukraine. (AP Photo/Virginia Mayo)
Vice President Joe Biden listens to remarks to the media during a meeting between President Barack Obama and NATO Secretary General Jens Stoltenberg, Tuesday, May 26, 2015, in the Oval Office of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)
President Barack Obama listens as NATO Secretary General Jens Stoltenberg speaks to members of the media during their meeting, Tuesday, May 26, 2015, in the Oval Office of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)
Secretary General of NATO Jens Stoltenberg said that while it is "too early" to comment on proposals to provide permanent NATO troops to the Baltic states of Estonia, Latvia and Lithuania, they may be considered. (Associated Press)
National Edition News cover for April 22, 2015 - Russia tests resolve of NATO allies for former Soviet blocs: FILE - In this Friday, May 9, 2014 file photo Russian President Vladimir Putin attends a parade marking the Victory Day in Sevastopol, Crimea. With hundreds of new aircraft, tanks and missiles rolling off assembly lines and Russian jets buzzing European skies under NATO’s wary eye, it doesn’t look like Russia’s economic woes have had any impact on the Kremlin’s ambitious military modernization program. (AP Photo/Ivan Sekretarev, File)
Russian President Vladimir Putin has authorized a string of provocative moves from the Arctic to the Black Sea in recent months in an attempt to intimidate NATO allies along the border for the old Soviet Union, including Hungary, Romania and Latvia, and boost allies of Moscow living in those countries. (Associated Press)
NATO's Supreme Allied Commander for Europe (SACEUR) US General Philip Breedlove speaks at a press conference at the KFOR military headquarters in capital Pristina on Thursday, Feb. 19, 2015 during his visit to Kosovo. (Associated Press)
L42A1 ENFIELD (U.K.) - The L42A1 was a British Army sniper rifle chambered for the 7.62mm NATO cartridge which entered service in 1970. It served until replacement by the Accuracy International L96 in 1985. It was the last model in a long and famous line of Lee bolt action rifles using the rear-locking action designed by James Paris Lee to serve the British Army, which had first entered service in the Lee-Metford rifle of 1888. During its British Army service, the L42A1 saw active service during several conflicts including the Dhofar Rebellion in Oman, The Troubles in Northern Ireland, the Falklands War and Gulf War. The L42A1 was a 7.62Ã—51mm NATO conversion of the .303 British chambered Lee-Enfield No. 4 Mk1 and No. 4 Mk1 WWII-era British sniper rifles, which had remained in service for some time after the L1A1 variant of the 7.62mm FN FAL replaced the No.4 Lee Enfield as the standard service rifle in 1957.
HECKLER & KOCH G3 - a 7.62 X 51 mm NATO battle rifle developed in the 1950s by the German armament manufacturer Heckler & Koch GmbH (H&K) in collaboration with the Spanish state-owned design and development agency CETME. The Heckler & Koch G3A4 (top) and G3A3.
FN FAL - Fusil Automatic Leger (Light Automatic Rifle) or FAL is a semi-automatic, selective fire battle rifle produced by the Belgian armaments manufacturer Fabrique Nationale de Herstal (FN). During the Cold War it was adopted by many North Atlantic Treaty Organization (NATO) countries, with the notable exception of the United States. It is one of the most widely used rifles in history, having been used by more than 90 countries. The FAL was predominantly chambered for the 7.62Ã—51mm NATO round, and because of its prevalence and widespread use among the armed forces of many NATO countries during the Cold War it was nicknamed 'The right arm of the Free World.'
U.S. Air Force Gen. Philip Breedlove, the Supreme Allied Commander Europe, looks on during a NATO conference in Thessaloniki, Greece, on Wednesday Oct. 15, 2014. (AP Photo/Grigoris Siamidis) ** FILE **
Holocaust denial video that suggested Jews were not exterminated by gas chambers at the Nazi Auschwitz concentration camp mysteriously received flattering praise in letters from the offices of one U.S. representative, a Maine state representative and a high-ranking policy adviser to the president of Hungary who now works for NATO. (AP Photo)
U.S. President Barack Obama, right, points as he stands alongside British Prime Minister David Cameron, center, and NATO Secretary General Anders Fogh Rasmussen during a flypast at the NATO summit at the Celtic Manor Resort in Newport, Wales on Friday, Sept. 5, 2014. (AP Photo/Jon Super) ** FILE **
alliance: U.S. President Barack Obama and Ukraine President Petro Poroshenko at the NATO summit at Celtic Manor in Newport, Wales, where they and other world leaders discussed Russian aggression. (Associated Press)
Both President Obama and British Prime Minister David Cameron (right) have stepped up their rhetoric on the Islamic State group this week, and are hoping to rally international support for defeating the terrorist organization while attending the NATO summit. (Associated Press)
President Obama spoke in Estonia about the need for NATO to defend its member states, many of whom are wary of Russian incursions similar to what has occurred in the Ukrainian theater. (Associated Press)