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    Watch: World's largest active volcano erupts in Hawaii

    01:03
  • Families of Buffalo mass shooting victims react to suspect's guilty plea in state charges

    01:58
  • Mauna Loa, world's largest volcano, erupts for first time in nearly 40 years

    00:20
  • Buffalo shooting suspect pleads guilty to state charges, will spend life in prison

    02:25
  • 2 rescued from small plane after hitting power tower

    01:07
  • Small plane with 2 on board strikes power tower in Maryland

    01:32
  • Manhunt underway for Connecticut man accused of brutally murdering 11-month-old daughter

    01:32
  • Baby, 3-year-old found stabbed to death in NYC apartment

    01:01
  • Watch: Off-duty New York fireman saves woman from burning car

    01:55
  • Atlanta shooting leaves at least 1 dead, 5 injured

    01:28
  • McDonald's employees deliver baby in store bathroom

    01:38
  • Family of Missouri death row inmate asks for clemency

    01:41
  • Coast Guard rescues cruise ship passenger from Gulf of Mexico

    01:28
  • Mexico seeking American extradition on charges in tourist death

    02:25
  • USA holds off England as Americans tune into World Cup

    03:04
  • Officials obtain arrest warrant in death of 25-year-old Shanquella Robinson

    03:27
  • The legendary Rockettes share their spectacular stories of sisterhood

    01:52
  • Fentanyl delivered illegally via Uber Connect

    02:39
  • Black Friday shoppers back in stores as Covid restrictions wind down

    01:55
  • Walmart shooter purchased handgun just hours before shooting, investigators reveal

    02:00

White House Wants To Cut Smog Emissions

01:31

The Obama administration is proposing tough new air pollution standards, even as opponents call it the most expensive set of regulations in US history. NBC's Brian Mooar reports.