Former U.S. Rep. Heather Wilson, R-N.M., has been selected as President Trump's nominee for secretary of the Air Force. Eric Draper/AP hide caption
President Trump announces retired Marine Corps Gen. James Mattis as his choice for defense secretary, on Dec. 6 in Fayetteville, N.C. Trump, who was highly critical of Barack Obama's military and foreign policies during the presidential campaign, inherits a number of challenges. Andrew Harnik/AP hide caption
This fence, made of circa-Vietnam War era surplus landing mats, ends at Otay Mesa about 15 miles east of the Pacific Ocean. Tijuana is on the left and California on the right. There are two other kinds of fencing along the U.S.-Mexico border: steel mesh and concrete-filled steel beams. John Burnett/NPR hide caption
Trump Takes On Ambitious Plan To Eliminate Terrorism By Radical Islamists
Authorities escort Joaquin "El Chapo" Guzman to a waiting caravan of SUVs at Long Island MacArthur Airport on Thursday in Ronkonkoma, N.Y. AP hide caption
'The Atlantic' Writer Argues Obama Confronted Pitfalls Of Fact-Based Foreign Policy
Trump transition spokesman Sean Spicer says important national security and economic appointees from Obama administration will stay on for now. Evan Vucci/AP hide caption
The Pentagon says many of the ISIS fighters targeted in Wednesday's strike escaped from the former ISIS stronghold of Sirte, shown here during fighting in September. Manu Brabo/AP hide caption
Artwork and signatures cover a fence around the Pulse nightclub in Orlando, Fla., on Nov. 30, 2016. John Raoux/AP hide caption
Ex-CIA Chief Woolsey Voices Concern About Chelsea Manning's Commutation
A Humvee passes the guard tower at the entrance of the U.S. prison at Guantanamo Bay in October 2016. John Moore/Getty Images hide caption
One of the 8,400 remaining U.S. troops in Afghanistan guards the bay of a CH-47 Chinook transport helicopter as it flies near Kabul. David Welna/NPR hide caption
Senate Panel Grills S.C. Gov. Nikki Haley In Her Bid To Become U.N. Ambassador
National Security Agency leaker Edward Snowden speaks via video link during the Athens Democracy Forum, organized by The New York Times, at the National Library in Athens on Sept. 16, 2016. Snowden is in exile in Moscow; Russia has extended his residence permit. Kostas Baltas/InTime Sports via AP hide caption
Reaction Varies To Chelsea Manning's Prison Sentence Being Shortened
Chelsea Manning had been sentenced to 35 years for leaking military secrets to WikiLeaks. Civil liberties groups have praised President Obama's decision to commute the sentence, but some Republican leaders are outraged. AP hide caption