The Federal Aviation Administration has required airlines to cut flights to reduce the strain on air traffic controllers, who have gone weeks without a paycheck.

The U.S. government shutdown has rattled air travel — most recently with an unprecedented effort from the Federal Aviation Administration to

U.S. airlines and travelers slogged through a second day of flight cuts across the country on Saturday as the government shutdown was expected to drive more cancellations in the days to come. The Federal Aviation Administration instructed airlines to cut 4% of flights on Saturday at 40 major airports because of the shutdown.