View of a control tower at the Chennault Regional Airport in Lake Charles, Louisiana, U.S., May 8, 2023. REUTERS/Andy Sullivan 

A view of the air traffic control tower at O’Hare International Airport after the Federal Aviation Administration (FAA) ordered airlines to pause all domestic departures due to a system outage, in Chicago, Illinois, U.S., January 11, 2023. REUTERS/Jim Vondruska 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

An Emirates aircraft taking off is seen from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

Passengers board an aircraft at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

Swiss and Easyjet Aircrafts are pictured at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view of the control tower of the Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view of the control tower of the Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view from the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

Skyguide CEO Alex Bristol speaks to the journalists during a news conference in the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

The flights notice board is pictured at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

Swiss aircrafts are pictured at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view of the control tower of the Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view of the control tower of Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

Skyguide CEO Alex Bristol speaks to the journalists during a news conference in the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

Swiss aircraft is pictured at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

A view of the control tower of the Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

Skyguide CEO Alex Bristol speaks to the journalists during a news conference in the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

Skyguide CEO Alex Bristol speaks to the journalists during a news conference in the control tower at Cointrin airport in Geneva, Switzerland, July 28, 2022. REUTERS/Pierre Albouy 

An airport staffer stands at the control tower ahead of the arrival of a Yemen Airways plane for the first commercial flight from the airport in six years from Sanaa Airport, in Sanaa, Yemen May 16, 2022. REUTERS/Khaled Abdullah 

The control tower is pictured from an area of the new Felipe Angeles international airport, in Zumpango, Mexico State, Mexico April 23, 2022. REUTERS/Quetzalli Nicte-Ha 

The control tower is pictured from an area of the new Felipe Angeles international airport, in Zumpango, Mexico State, Mexico, April 1, 2022. Picture taken April 1, 2022. REUTERS/Kylie Madry 

The control tower is seen as people visit the new Felipe Angeles International Airport, on the day of the inauguration ceremony, in the Zumpango municipality in Mexico state, Mexico March 21, 2022. REUTERS/Luis Cortes 

A view of the control tower at the new Felipe Angeles International Airport, on the day of the inauguration ceremony, in the Zumpango municipality in Mexico state, Mexico March 21, 2022. REUTERS/Luis Cortes 

The control tower of the new Felipe Angeles International airport, which Mexican government aims to inaugurate on March 21, is pictured during a bicycle ride to show people the facilities in Zumpango, Mexico State, Mexico March 13, 2022. REUTERS/Luis Cortes 

The control tower at Los Angeles International Airport (LAX) is shown in Los Angeles, California, U.S., January 26, 2022. REUTERS/Mike Blake 

The control tower overlooks the field at Logan Airport, amid concerns about 5G networks interfering with some airplane instruments, in Boston, Massachusetts, U.S., January 19, 2022. REUTERS/Brian Snyder 

EasyJet airline aircrafts are pictured in front of the control tower on the tarmac at Cointrin airport in Geneva, Switzerland June 24, 2021. REUTERS/Denis Balibouse 

Tower Tech Inc. founder, Titus "Stretch" Gall, uses binoculars to scan the skyline from his mobile air traffic control tower while on contract with Sacramento McClellan Airport in Sacramento, California, U.S., June 5, 2021. Picture taken June 5, 2021. REUTERS/Tracy Barbutes 

Tower Tech Inc. founder, Titus "Stretch" Gall, talks to pilots via radio from his mobile air traffic control tower as U.S. Air Force C-17 airplanes fly overhead at Sacramento McClellan Airport in Sacramento, California, U.S., June 5, 2021. Picture taken June 5, 2021. REUTERS/Tracy Barbutes 

A U.S. Air Force C-17 makes its final approach at Sacramento McClellan Airport while speaking with Tower Tech Inc. air traffic controllers, in Sacramento, California, U.S., June 5, 2021. Picture taken June 5, 2021. REUTERS/Tracy Barbutes 

Tower Tech Inc. founder, Titus "Stretch" Gall, attaches a rooftop antenna on his mobile air traffic control tower parked at Sacramento McClellan Airport in Sacramento, California, U.S., June 3, 2021. Picture taken June 3, 2021. REUTERS/Tracy Barbutes 

Tower Tech Inc. founder, Titus "Stretch" Gall, hauls his mobile air traffic control tower onto the Sacramento McClellan Airport in Sacramento, California, U.S., June 3, 2021. Picture taken June 3, 2021. REUTERS/Tracy Barbutes 

A radio sits on a counter in a Tower Tech Inc. mobile air traffic control tower at Sacramento McClellan Airport in Sacramento, California, U.S., June 3, 2021. Picture taken June 3, 2021. REUTERS/Tracy Barbutes 

A pilot flies a Spitfire past the Tower Tech Inc., mobile air traffic control tower, at Sacramento McClellan Airport in Sacramento, California, U.S., May 6, 2021. Picture taken May 6, 2021. REUTERS/Tracy Barbutes 

The control tower is seen during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

A general view of the terminal C and the control tower from the tarmac during the media tour at the former Berlin Tegel airport, as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

The control tower, the main building and a passenger docking passage are seen during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

A general view of the main building and the control tower from the tarmac during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

The access road to the main building and the control tower are seen during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

A general view of the main building and the control tower from the tarmac during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

The former parking lot, the main building and the control tower are seen during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

The access road to the main building and the control tower are seen during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

The main building and the control tower are seen during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

The main building and the Control Tower are seen during the media tour at the former Berlin Tegel airport, as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

The main building and the control tower are seen during the media tour at the former Berlin Tegel airport as the city's authorities are planning to build there more than 5,000 apartments, in Berlin, Germany May 4, 2021. Picture taken May 4, 2021. REUTERS/Michele Tantussi 

The new remote control tower is seen between traffic cones at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

The new remote control tower is seen at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

Alison FitzGerald, chief operating officer of London City Airport poses for a photograph at LCY, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

Tail fins of British Airways Embraer 190 aircraft are pictured at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

British Airways Embraer 190 aircraft takes off from London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

British Airways Embraer 190 aircraft are pictured at London City Airport, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley 

Alison FitzGerald, chief operating officer of London City Airport poses for a photograph at LCY, Britain, April 29, 2021. Picture taken April 29, 2021. REUTERS/John Sibley