

A Kiowa helicopter flies over the heads of paratroopers from Chosen Company of the 3rd Battalion (Airborne), 509th Infantry on a mission to investigate the source of several mortar rounds that landed on Combat Outpost Herrera in Afghanistan's Paktiya province July 14, 2012. Lucas Jackson/Reuters
People walk past a soldier participating in an anti-terror drill at a subway station in Seoul Aug. 22, 2012. South Korean and US forces began the Ulchi Freedom Guardian (UFG) drill, an annual joint exercise to practice their defence ability against North Korea. About 56,000 South Korean soldiers and 30,000 US troops will attend in the computer-aided military drill which will last until August 31, according to local media. Kim Hong-Ji/Reuters
In this photo taken with a night vision scope on Wednesday, Oct. 28, 2009, Afghan National Army soldiers, and a US Special Operations force (l.) examine documents during a joint operation targeting insurgents operating in Afghanistan's Farah province. Maya Alleruzzo/AP
US Navy safety swimmers stand on the deck of the Virginia class submarine USS New Hampshire after it surfaced through thin ice during exercises underneath ice in the Arctic Ocean north of Prudhoe Bay, Alaska. Lucas Jackson/Reuters
A US Army soldier with the 10th Special Forces Group and his military working dog jump off the ramp of a CH-47 Chinook helicopter from the 160th Special Operations Aviation Regiment during water training over the Gulf of Mexico as part of exercise Emerald Warrior 2011 Manuel J. Martinez/US Air Force/Reuters
Servicemen of the Belarussian Interior Ministry's special unit break flaming tiles with their heads during a show to commemorate the annual Day of Special Forces celebration in Minsk. Vladimir Nikolsky/Reuters
Graduating soldiers from the Saudi special forces' anti-terror unit demonstrate their skills in protecting VIPs under attack in Riyadh. Fahad Shadeed/Reuters
Soldiers from the Iraqi special operations forces dressed in ghillie suits take part in a parade at a military base near Baghdad's airport. Mohammed Ameen/Reuters
US Special Operations forces are seen through a night vision scope, during a joint operation with Afghan National Army soldiers targeting insurgents operating in Afghanistan's Farah province. Maya Alleruzzo/AP
The lifeboat that Maersk-Alabama captain Richard Phillips is held hostage in is seen in this US Navy handout photograph taken by the Scan Eagle UAV (unmanned aerial vehicle) taken April 9, 2009 over the Indian Ocean. Phillips was freed from captivity at the hands of Somali pirates in a dramatic ending to a five-day standoff with American naval forces. US Navy/Reuters
The US Navy Sea, Air, Land (SEAL) Delivery Vehicle Team 1 conduct a free-fall parachute training jump from a US Army UH-60L Black Hawk helicopter. The US Navy snipers who fired three flawless shots from the bow of the USS Bainbridge to kill a trio of Somali pirates and free American merchant Capt. Richard Phillips on April 13, 2009, had parachuted into the sea to join the destroyer. US Navy/AP
Half-naked South Korean Special Warfare Forces reacts during a winter exercise in Pyeongchang, South Korea. Lee Jin-man/AP
Soldiers of a special forces unit walk after a military exercise in Tibi, near Alicante, Spain. Heino Kalis/Reuters
A Kaibil, a member of Guatemala's special forces, participates in an exhibition during a graduation ceremony in Poptum, Peten, 250 miles from Guatemala City. The elite group of the Guatemalan Army, founded in 1974, held a graduation ceremony to commemorate nine members who have successfully completed the 77th international Kaibil course. Jorge Dan Lopez/Reuters
Divers from Poland's Elite Special Forces Unit, GROM, are hoisted from the waters of the Baltic Sea November 29, 2011. Poland is investing heavily in security for next year's European football championship despite downgrading the number of visitors it expects. Commandoes have been simulating a multiple hostage situation in case criminals target the world's second largest football tournament, which is being co-hosted with Ukraine next June. Peter Andrews/Reuters