Big flyover and DCA ground stop planned Saturday

An airplane flies above Rosslyn in 2021 (staff photo by Jay Westcott)
A large-scale flyover planned for Saturday is expected to bring some air traffic at National Airport to a temporary halt.
Two dozen groups of general aviation aircraft are expected to fly from Frederick, Maryland, down the Potomac River and across the National Mall. The Mall flyover is scheduled to take place between noon and 1 p.m.
“During that time, Ronald Reagan Washington National Airport will be under a ground stop,