Now Playing: Homeless veteran rescues victim from car crash

Now Playing: NASA tests engine for manned flight into deep space

Now Playing: Couples wed amid deadly California wildfires

Now Playing: Police take Maryland workplace shooter into custody

Now Playing: How Long Island's former 'Tupperware queen' came out as her true self

Now Playing: Richard Spencer to speak at the University of Florida

Now Playing: Suspect in separate shootings in Maryland, Delaware held on $2.1M cash bail

Now Playing: Boy booted from Cub Scouts after asking Colorado senator hard questions

Now Playing: Mattis on Niger ambush: 'The US military does not leave its troops behind'

Now Playing: 5 injured after small plane lands on Florida road

Now Playing: Fallen soldier's widow weeps as casket returns home

Now Playing: California anticipates much-needed rain this week after catastrophic wildfires

Now Playing: Deputy uses car jack to free trapped boy

Now Playing: New video shows bombing at Minnesota mosque

Now Playing: Multiple injuries reported in Maryland shooting: Police

Now Playing: 3 dead in Maryland workplace shooting: Police

Now Playing: Trump denies telling widow of fallen soldier, 'He knew what he signed up for'

Now Playing: Congresswoman recounts Trump's call to widow of fallen soldier

Now Playing: Frightening video captures shooting suspects carjacking woman with baby

Now Playing: Maryland shooting suspect connected to 2nd shooting in Delaware