Now Playing: College Packing List: Pick It or Skip It?

Now Playing: Battling the Freshman Fifteen

Now Playing: Top Things College Doesn't Teach You

Now Playing: 16 states sue to stop Trump's use of power to build the wall

Now Playing: Mom speaks out about son's Pledge of Allegiance arrest

Now Playing: Bystanders rescue woman trapped in burning car

Now Playing: Virginia official accuser demands a public hearing

Now Playing: Hiker rescued from quicksand amid snowstorm

Now Playing: New twist in Jussie Smollett case as police search for motive

Now Playing: The reason Miranda Lambert fell in love with her new NYPD husband

Now Playing: Help Lara Spencer get ready for the Oscars

Now Playing: Iconic designer Karl Lagerfeld dies in Paris, French media reports

Now Playing: Screen time for 2-year-olds and younger has doubled since the mid-90s, study finds

Now Playing: Colton Underwood surprises fans at a 'Bachelor' viewing party

Now Playing: Colton Underwood talks about his love journey and that fence jump on 'GMA'

Now Playing: Bernie Sanders announces 2020 presidential run

Now Playing: American woman claims she was brainwashed by ISIS

Now Playing: A look back at some memorable speeches from Meryl Streep, Halle Berry and more

Now Playing: See the 2019 Oscar nominees on their first Oscars red carpets

Now Playing: Meghan Markle makes secret trip to New York City