An Estonian soldier takes aim during a training exercise at Tapa Army Base, Estonia, on Nov. 17. U.S. troops were also taking part in the training, about 70 miles from the border with Russia. NATO countries are stepping up their presence in Eastern Europe at a time of rising tensions with Russia. Lucian Kim/NPR hide caption
A girl named Farida, age 7, and her mother at a hospital after a militant attack on a Shiite shrine in Kabul, Afghanistan, on Oct. 12. Rahmat Gul/AP hide caption
The U.S. Air Force Honor Guard carries the remains of World War II pilot Elaine Harmon during services on Wednesday at Arlington National Cemetery in Arlington, Va. Pablo Martinez Monsivais/AP hide caption
Ameera, 6, walks with assistance at the Craig Joint Theater Hospital at Bagram Airfield, Afghanistan. She is recovering from a gunshot wound sustained when she was caught in a firefight between U.S. and Afghan soldiers and Taliban insurgents. Senior Airman Robert Dantzler/U.S. Air Force hide caption
A MiG-21 fighter — a leftover monument from the Soviet era — is the centerpiece of the Aviators Neighborhood in Deveselu, Romania. Now the base has become a U.S. Navy facility that is part of NATO's anti-missile shield for Europe. Gabriel Amza for NPR hide caption
Zabihuillah Niazi, a 25-year-old nurse, lost an eye and an arm when an American AC-130 gunship shelled the Medecins Sans Frontieres trauma center in Kunduz, Afghanistan, in October 2015, killing 42 people. Zabihullah Tamanna for NPR hide caption
A scientist examines mosquitoes at the lab. Walter Reed Army Institute of Research hide caption
Defense Secretary Ash Carter (left) and Joint Chiefs Chairman Gen. Joseph Dunford, speak at the Pentagon on Friday. They announced that U.S. forces killed a senior Islamic State leader in an airstrike. Manuel Balce Ceneta/AP hide caption
U.S. soldiers in Afghanistan walk away from a helicopter at Forward Operating Base Connelly in the eastern province of Nangarhar on Aug. 13. The U.S. formally ended combat operations in Afghanistan at the end of last year. But nearly 10,000 American troops remain in the country and the U.S. frequently carries out air sorties. Fourteen American military personnel have died in Afghanistan this year. Wakil Kohsar/AFP/Getty Images hide caption
On May 21, an Afghan child is treated at a Doctors Without Borders hospital in the northern city of Kunduz, after being injured in a fight between the Taliban and Afghan security forces. Shah Marai/AFP/Getty Images hide caption
Sgt. Bowe Bergdahl faced a preliminary hearing in San Antonio last week. He faces a possible court-martial for walking off his base in Afghanistan in 2009. An Army investigation produced a wealth of new information on his motivations. The major general who led the inquiry recommended against a prison sentence. AP hide caption
The Pentagon's only maximum security prison, at the U.S. Army's Fort Leavenworth in Kansas, is one of the facilities being considered for placement of Guantanamo prisoners deemed too dangerous to release. Julie Denesha/Getty Images hide caption