-
Now Playing: North Korea threatens to cancel summit with U.S.
-
Now Playing: North Korea cancels planned meeting with South Korea
-
Now Playing: Trump raises doubts North Korea summit will happen in June
-
Now Playing: Trump says North Korea summit 'may not work out'
-
Now Playing: Trump meets South Korean leader, 'demands' DOJ investigates FBI
-
Now Playing: Georgia voters turn out for primary elections
-
Now Playing: Gina Haspel sworn in as CIA director
-
Now Playing: DHS secretary 'not aware' Putin tried to help Trump win 2016 election
-
Now Playing: Former director of national intelligence James Clapper on distrust of intel agencies
-
Now Playing: Rosenstein agrees to Trump 'demand' for probe: WH
-
Now Playing: Trump enters talks with Moon amid uncertainty over North Korea summit
-
Now Playing: Rosenstein agrees to investigate Trump claims of DOJ infiltration
-
Now Playing: Trump, upset about Russia probe, meets with deputy AG and FBI director
-
Now Playing: Democrats slam Trump's call for new DOJ probe
-
Now Playing: Writer Mark Salter and filmmaker Teddy Kunhardt on their tributes to Sen. John McCain
-
Now Playing: New CIA Director Gina Haspel sworn in
-
Now Playing: Pompeo outlines demands for a new treaty with Iran
-
Now Playing: Former President Carter ribs Trump's 'crowd size' during graduation speech
-
Now Playing: Trump orders DOJ to see if campaign was spied on