WATCH: Gas line rupture believed to be cause of San Francisco blast

WATCH: Gas line rupture believed to be cause of San Francisco blast
  • Now Playing: No criminal charges for deadly gas explosion in Wisconsin



  • Now Playing: Officer-involved shooting captured on video in San Francisco leaves many concerned



  • Now Playing: Gas line rupture believed to be cause of San Francisco blast



  • Now Playing: School bus overturns on icy road



  • Now Playing: Two dogs praised for running to get help for owner suffering stroke



  • Now Playing: Judge arrested for allegedly driving under the influence in Ohio



  • Now Playing: At least 10 electrical blasts reported under famous Atlanta street



  • Now Playing: Milwaukee police officer fatally shot serving search warrant



  • Now Playing: Connecticut police trying to identify woman found dead in suitcase



  • Now Playing: Pelosi slams Trump’s State of the Union warning to Congress



  • Now Playing: Senator apologizes for her claims of an American Indian heritage



  • Now Playing: Questions swirl around pilot in fatal plane crash in California



  • Now Playing: Icy storm moves east, leaving thousands without power in Midwest



  • Now Playing: Virginia attorney general reveals he wore blackface in 1980s



  • Now Playing: Internal probe launched in police threat to call ICE



  • Now Playing: Cathy Wusterbarth from Oscoda, Michigan, attends State of the Union



  • Now Playing: Jemele Hill on race and politics in sports and her criticism of President Trump



  • Now Playing: Milwaukee police officer killed marking the city’s 3rd officer death in 8 months



  • Now Playing: Man awarded Super Bowl tickets killed in fatal car fire before game



  • Now Playing: Mom’s dance in traffic during jam goes viral



  • Read More