Now Playing: Salmonella Danger: Egg Recall Expanded

Now Playing: Outbreak Causes Massive Egg Recall

Now Playing: FDA issues warnings of 'young blood' transfusions

Now Playing: Firefighters surprise Baltimore couple with adopted son

Now Playing: Gunman caught on surveillance footage sought in deadly Florida shooting

Now Playing: New details in case of missing Colorado mom

Now Playing: Trump weighs in on potential release of the Mueller report

Now Playing: Coast Guard lieutenant's mass attack plan thwarted

Now Playing: Massive winter storm hits Northeast during evening commute

Now Playing: Alabama 'ISIS Bride' will not be allowed to return to US: Trump

Now Playing: DNA in a 46-year-old cold case murder leads to an arrest

Now Playing: Jussie Smollett is named a suspect by Chicago police in alleged attack

Now Playing: American 'ISIS Bride' speaks out

Now Playing: Legendary Brooklyn Dodgers pitcher dies at 92

Now Playing: The latest development in the Jussie Smollett attack

Now Playing: Close-up whale breach in Hawaii

Now Playing: World-renowned fashion designer Karl Lagerfeld dies in Paris

Now Playing: Duchess Meghan Markle in NYC

Now Playing: Scare at San Diego SeaWorld

Now Playing: Ex-NFL player killed over a parking spot in Colorado