The Federal Aviation Administration said it would delay the closing of 149 air-traffic control towers until June 15.
The FAA was planning to close towers at 24 small airports on Sunday. Another 46 were to close on April 24, and the final 79 would have closed on May 5. All of the airports would remain open but without the controllers who keep airplanes a safe distance apart and notify arriving pilots of runway hazards, such as wildlife or ice.