-
Now Playing: Paul Ryan to Run On His Terms
-
Now Playing: Massive migrant caravan heads to US
-
Now Playing: America on high alert as inauguration approaches
-
Now Playing: Alexei Navalny detained after landing in Moscow
-
Now Playing: Military father surprises children after returning home
-
Now Playing: Arrest made in the killing of a recent college graduate
-
Now Playing: Chaos and confusion surrounds COVID-19 vaccine rollout
-
Now Playing: Is Trump ready for his impeachment trial?
-
Now Playing: Threat levels raised in all 50 state capitals
-
Now Playing: Green zone perimeter established in Washington, DC
-
Now Playing: Former college baseball player returns to the field after 50 years
-
Now Playing: Search for survivors underway after deadly earthquake
-
Now Playing: Manhunt underway after shooting of recent college graduate
-
Now Playing: Major winter storm brings blizzard conditions to Midwest
-
Now Playing: Fatal police shooting under investigation in Texas
-
Now Playing: COVID-19 UK variant spreads across parts of US
-
Now Playing: Biden braces to take on COVID-19 emergency
-
Now Playing: President Trump spends last weekend in the White House
-
Now Playing: Washington, DC preps for Biden inauguration
-
Now Playing: FBI prepares for Inauguration Day, institutes security lockdowns