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The air traffic control tower at McCarran International Airport in Las Vegas is temporarily closed after a controller tested positive for coronavirus on Wednesday, according to the Federal Aviation Administration.
The decision was made to ensure a safe work environment for air traffic controllers and technicians.
"The airport remains open and operations will continue at a reduced rate until the situation is resolved," the FAA said.
The Las Vegas Terminal Radar Approach Control has assumed control over the airspace.
The shift was made as part of a long-standing contingency plan to keep operations running, according to KTNV-TV Las Vegas. The air traffic system is described as resilient with multiple backups in place.