Lt. Gen. H.R. McMaster looks on as President Trump announces him as his national security adviser at Trump's Mar-a-Lago resort in Palm Beach, Fla., on Monday.
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Defense Secretary Jim Mattis seems to be aiming to reassure U.S. allies while overseas. Ahead of an unannounced visit to Iraq, Mattis rejected President Trump's statements that the U.S. should have seized Iraqi oil after the invasion.
A fighter of the Hashed al-Shaabi (Popular Mobilization) paramilitaries stands guard near the front-line village of Ayn al-Hisan, west of Mosul, where Iraqi forces were preparing to launch an offensive to retake the western side of the city from the Islamic State.
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Then-deputy director of CENTCOM, U.S. Navy Vice Admiral Robert Harward, is pictured with Jordan's Prince Faisal and the Army's head of operations and training Major General Awni Adwan in a May 2012 photo. Harward is now under consideration to replace Michael Flynn as President Trump's national security adviser.
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Pictures of people who were incarcerated at Manzanar War Relocation Center are displayed alongside family tags at Manzanar National Historic Site near Independence, Calif., in 2015.
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A Syrian refugee boy plays outside his family's tent in a Syrian refugee camp in the town of Zahrani, Lebanon, in December. Some 1 million Syrians live in Lebanon as refugees, according to the U.N.