NATO'a Major air defense exercise starts in Germany

An air deployment exercise billed as the biggest in NATO's history and hosted by Germany is getting underway on Monday.

The Air Defender 23 exercise that is set to run through June 23 was long-planned but serves to showcase the alliance's capabilities amid high tensions with Russia.

Some 10,000 participants and 250 aircraft from 25 nations will respond to a simulated attack on a NATO member. The United States alone is sending 2,000 U.S. Air National Guard personnel and about 100 aircraft.

"The exercise is a signal - a signal above all to us, a signal to us, the NATO countries, but also to our population that we are in a position to react very quickly ... that we would be able to defend the alliance in case of attack,” German air force chief Lt. Gen. Ingo Gerhartz told ZDF television.

Gerhartz said he proposed the exercise in 2018, reasoning that Russia's annexation of Crimea underlined the need to be able to defend NATO.

Sweden, which is hoping to join the alliance, and Japan are also taking part in the exercise.

Assessments of the extent to which the exercise will disrupt civilian flights have varied widely. Matthias Maas, the head of a German air traffic controllers' union, GdF, has said that it "will of course have massive effects on the operation of civilian aviation.”

Gerhartz disputed that. He said that Germany's air traffic control authority has worked with the air force to keep disruption "as small as possible.” He noted that the exercise is limited to three areas which won't all be used at the same time, and that it will be over before school vacations start in any German state.

"I hope that there we will be no cancellations; there may be delays in the order of minutes here and there,” he said, insisting that a study cited by the air traffic controllers' union assumes a worst-case scenario in bad weather in which the military wouldn't fly anyway.