"This is about where’s the pressure and how do we alleviate the pressure," Transportation Secretary Sean Duffy said.

The Federal Aviation Administration said Wednesday that it was taking the extraordinary step of reducing air traffic by 10% across 40 “high-volume” markets beginning Friday morning to maintain travel safety as air traffic controllers exhibit signs of strain during the ongoing government shutdown.

In California, four of the biggest airports will feel the reduction from San Francisco and Oakland to LAX and San Diego.

Harry Reid International Airport is reportedly among the impacted airports, according to a major news network.

The FAA's plan to slash airline capacity due to the government shutdown could hit some of the nation's busiest airports, including in Atlanta, Dallas, New York City and Los Angeles, according to a proposed list obtained by CBS News.

The US government is aiming to ease the pressure on air traffic controllers suffering shutdown-related woes by curtailing flights. But airlines have experience with this kind of sudden disruption.

The FAA has not yet released its final order specifying which airports will be affected, but a proposed list provided to CBS News outlines dozens of the nation’s busiest hubs.

Minneapolis - St. Paul International Airport is one of 40 airports across the U.S. that will have its flight capacity reduced by the Federal Aviation Administration due to the federal government shutdown.

The Federal Aviation Administration will reduce flight capacity by 10% at 40 major airports across the country.

Joby Aviation (JOBY) has begun power-on testing for the first of several aircraft conforming to Federal Aviation Administration Type Inspection Authorization (TIA), a crucial step in obtaining FAA certification for its electric vertical takeoff and landing ((eVTOL)) aircraft and a pivotal step toward commercialization.