More Videos

Student walkouts, marches take gun control fight to the streets 1:37

Student walkouts, marches take gun control fight to the streets

Shooting reported near Fort Meade NSA campus 1:13

Shooting reported near Fort Meade NSA campus

Dow first falls 500 points as U.S. stock market opens, then recovers most of losses 1:49

Dow first falls 500 points as U.S. stock market opens, then recovers most of losses

Two students shot inside California middle school 0:58

Two students shot inside California middle school

Hawaii 'ballistic missile threat' false alarm, sent in error 0:44

Hawaii 'ballistic missile threat' false alarm, sent in error

Fire breaks out at Trump Tower in New York 0:26

Fire breaks out at Trump Tower in New York

FCC votes to repeal net neutrality regulations 0:17

FCC votes to repeal net neutrality regulations

FCC net neutrality vote interrupted due to security concern 0:54

FCC net neutrality vote interrupted due to security concern

Protesters rally against FCC net neutrality vote 1:44

Protesters rally against FCC net neutrality vote

Trump dismantles Bears Ears National Monument 1:15

Trump dismantles Bears Ears National Monument

Climate scientist explains marine cloud brightening to House committee

“We think SRM could buy time for other (carbon-reduction) measures to be put in place,” said Philip J. Rasch, chief climate scientist for the Pacific Northwest National Laboratory in Richland, Washington told the House Committee on Science, Space and Technology on Nov. 8, 2017.