Now Playing: President Trump says nothing about the mistaken missile alert in Hawaii

Now Playing: Hawaii Gov. David Ige addresses false emergency alert of incoming missile

Now Playing: Dangerous winds cause power outages in Northeast as arctic blast moves in

Now Playing: Gal Gadot announces baby No. 3 is on the way

Now Playing: Stephen King talks about his new book, 'Later'

Now Playing: ‘Klara and the Sun’ is the March 2021 ‘GMA’ Book Club pick

Now Playing: Breaking down drama from ‘The Bachelor: Women Tell All’ episode

Now Playing: 1st look at ‘Soul of a Nation’

Now Playing: TikTok couple talks about their rise to fame with incredible musical talents

Now Playing: Accusations against Gov. Andrew Cuomo bring issues of harassment at work to forefront

Now Playing: Federal judge opens up about returning to work 7 months after son killed

Now Playing: Lady Gaga's dog walker speaks for 1st time since dognapping

Now Playing: Lawyer for girl injured in wreck involving KC Chiefs coach breaks silence

Now Playing: Biden administration addresses immigration concerns

Now Playing: California offers massive payouts to schools to reopen during pandemic

Now Playing: CDC director warns of possible 4th COVID-19 wave

Now Playing: What to expect from Cuomo investigation

Now Playing: 3rd woman comes forward with harassment allegations against Cuomo

Now Playing: Teen climate activist calls for politicians to stop using the pandemic as an excuse

Now Playing: Jennifer Lopez celebrates twins Emme and Max's 13th birthday with sweet video