Now Playing: Rising cost of crude oil means a spike in prices for drivers at the pump

Now Playing: Trump spends the weekend lashing out against the media on Twitter

Now Playing: Southwest flights cancelled, delayed for emergency inspections

Now Playing: Suicide bomber in Kabul, Afghanistan, kills more than 50 people

Now Playing: Teen gunman confesses to opening fire inside a Florida school

Now Playing: An early Mother's Day present for a New York teacher

Now Playing: 7-year-old boy said to suffer a concussion after being dragged off school bus

Now Playing: Son gifts father with photo album of some of their best times together

Now Playing: Insurance warning for home owners

Now Playing: Possible break in relentlessly cold spring weather

Now Playing: Police cam shows officers circling the parking lot where teen died in his car

Now Playing: Missouri governor accused of a second felony

Now Playing: Manhunt in Georgia for convicted killer

Now Playing: Trump praises Michael Cohen on Twitter

Now Playing: Kim Jong Un under international spotlight after halting nuclear tests

Now Playing: Thousands pay respect to Barbara Bush at her funeral in Houston

Now Playing: Government expands warning over contaminated romaine lettuce

Now Playing: Surveillance video shows Prince in final hours before his death

Now Playing: Mourners pay their respects to Barbara Bush

Now Playing: N. Korea says it will suspend all nuclear and ICBM tests