Even when he's praising his spy chiefs, President Trump can't resist taking a swipe.

(Updated at 9:59 a.m. ET) President Trump fired Secretary of State Rex Tillerson on Tuesday morning in a tweet that followed a year of frequent tension between the two leaders. Trump said he is nominating CIA director Mike Pompeo as Tillerson's replacement, which requires confirmation by the Senate.

Updated at 1:49 p.m. ET with confirmation from the U.S. official and comments from Sen. Ron Wyden

The CIA has concluded that Russia intervened in the 2016 election specifically to help Donald Trump win the presidency, a U.S. official has confirmed to NPR.

David Hoffman details the story of Adolf Tolkachev, the most valuable Soviet spy during the Cold War, and the CIA agents he passed hundreds of thousands of pages of information to in his new book – the Billion Dollar Spy.