Now Playing: May 17, 1984: Linda Brown on becoming ‘the symbol of Brown vs. Board of Ed’
Now Playing: 4-year-old reunited with stranger who donated liver for transplant
Now Playing: Bus-sized space station likely to crash over parts of US: Scientists
Now Playing: FTC investigating Facebook’s privacy practices
Now Playing: Investigation underway into how deadly blaze ripped through Russian mall
Now Playing: Gas leak likely responsible for deaths of Iowa family in Mexico: Official
Now Playing: Helicopter pilot tells investigators passenger’s tether strap turned off fuel line
Now Playing: White House refuses to say whether Trump watched Stormy Daniels interview
Now Playing: Severe weather threat across Texas and Oklahoma
Now Playing: Family of unarmed man fatally shot by police planning to sue
Now Playing: Woman at center of 1954 landmark Supreme Court decision dies
Now Playing: ‘GMA’ Hot List: The cast of ‘Roseanne’ shares what it was like to return to set
Now Playing: Video of Penn State pledge chugging alcohol shown in court
Now Playing: ‘I’m in D.C. so Joaquin didn’t die for nothing,’ says Parkland student
Now Playing: Sacramento victim’s grandmother asks for justice in police shooting
Now Playing: U.S. Army veteran deported to Mexico
Now Playing: Stormy Daniels’ ’60 Minutes’ interview
Now Playing: Doorbell camera captures woman’s home fire ordeal
Now Playing: Will March for Our Lives get Congress to act on gun control?
Now Playing: HS students marching 4 days to Paul Ryan’s office for gun restrictions
