George Papadopoulos, left, pleaded guilty earlier this month to lying to FBI agents about a series of meetings he took and planned while he was a foreign policy adviser to the Trump campaign.
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Former Exxon Mobil executive Rex Tillerson testifies before the Senate Foreign Relations Committee on Jan. 11 during his confirmation hearing for secretary of state.
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President Trump and Defense Secretary James Mattis speak on Inauguration Day. Mattis travels to South Korea and Japan this week in the administration's first major foreign trip.
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Democratic presidential candidate Hillary Clinton delivered a national security speech in San Diego that harshly criticized Republican candidate Donald Trump's foreign policy positions.
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