Defense Secretary Ash Carter is expected to announce that women can now serve in front-line combat posts. Here, Carolina Ortiz moves away from a 155-mm artillery piece after loading it during a live-fire exercise at the Marine base in Twentynine Palms, Calif., earlier this year, during a months-long study of how women might perform in ground combat jobs. David Gilkey/NPR hide caption

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Members of Doctors Without Borders demonstrated in Geneva, after U.S. forces bombed the organization's hospital in the northern Afghanistan city of Kunduz. Fabrice Coffrini/AFP/Getty Images hide caption

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Paid advertisement? A soldier holds an American flag before the first half of a 2013 NFL football game between the Atlanta Falcons and the New England Patriots in Atlanta. David Goldman/AP hide caption

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Sens. John McCain, R-Ariz., (left) and Jack Reed, D-R.I., hear testimony on operations against ISIS from Gen. Lloyd Austin. Pablo Martinez Monsivais/AP hide caption

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Sources Detail Skewed Reports On How The U.S. Is Doing Against ISIS

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A Marine Corps F-35B Joint Strike Fighter does a short takeoff (STOVL) from Patuxent River Naval Air Station, Md., in 2011. Eighteen years after development began, a version of the plane designed for the Marine Corps is expected to be deemed "combat ready." Cliff Owen/AP hide caption

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Zachary Gallegos, 23, stands guard outside the Armed Services Recruiting Center on Thursday in Sioux Falls, South Dakota. The Pentagon has asked such self-appointed "armed citizens" to leave, citing security concerns. Kevin Burbach/AP hide caption

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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

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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

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Edwin Hopkins with his mother, Alice, and father, Frank Jr. Hopkins was killed aboard the USS Oklahoma during the Japanese bombing of Pearl Harbor, but his remains never were identified. Courtesy Tom Gray hide caption

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Family Of Unaccounted For USS Oklahoma Sailor Wouldn't 'Let Him Go'

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A gravestone identifying the resting place of seven unknowns from the USS Oklahoma is shown at the National Memorial Cemetery of the Pacific in Honolulu. The Pentagon says it will disinter and try to identify the remains of up to 388 unaccounted for sailors and Marines killed when the ship capsized in the 1941 Japanese bombing of Pearl Harbor. Audrey McAvoy/AP hide caption

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Vice President Biden swears in Ashton Carter, as the new Secretary of Defense's wife, Stephanie, holds the Bible for a ceremony in the White House Tuesday. Shawn Thew/EPA/Landov hide caption

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An A-18C Hornet attached to Strike Fighter Squadron (VFA) 87, prepares to launch from the flight deck of the aircraft carrier USS George H.W. Bush (CVN 77) to conduct strike missions against Islamic State group targets. Robert Burck/AP hide caption

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