-
Now Playing: Gabby Giffords: Tucson Shooting Anniversary
-
Now Playing: Gabrielle Giffords: 'I Will Be Back'
-
Now Playing: Gabrielle Giffords: Anniversary of a Tragedy
-
Now Playing: USS Gabrielle Giffords Honors Courage
-
Now Playing: President prepares to host his first state dinner
-
Now Playing: Search for motive in Toronto van attack underway
-
Now Playing: Four people go home from 'American Idol'
-
Now Playing: 'Start Here' podcast: All eyes on Arizona
-
Now Playing: President Trump to host first state dinner
-
Now Playing: 'Start Here' podcast: Natalie Portman declines award, blames Benjamin Netanyahu
-
Now Playing: Two Florida sheriff's deputies ambushed at restaurant
-
Now Playing: President Donald Trump reacts to James Comey's memos
-
Now Playing: Friday Rewind: Barbara Bush passed away
-
Now Playing: Insomniac Theater: 'Super Troopers 2' & 'I Feel Pretty'
-
Now Playing: 'Start Here' podcast: National school walkout
-
Now Playing: Donald Trump's Wednesday-night news conference
-
Now Playing: Teen chef follows his dreams
-
Now Playing: 'Start Here' podcast: Olympians open up about abuse
-
Now Playing: 'Start Here' podcast: Comey and the GOP
-
Now Playing: Passengers describe jet engine exploding midair