The no-fly zone would plunge the US into World War III, according to Sen. Marco Rubio.

A no-fly zone has become a slogan. I'm not sure a lot of people understand what that means.

The willingness to shoot down and engage Russian airplanes in the sky means that. You can't put those planes up there unless the Russians are willing to destroy the anti-aircraft systems that they have deployed.

If people understand what a no-fly zone means, it means World War III. It means starting World War III. The willingness to shoot down the aircrafts of the Russian Federation is the beginning of World War III.

—This Week (@ThisWeekABC) March 6, 2022

Ukrainian President Volodymyr Zelensky has been calling for a no-fly zone. On Sunday, he reiterated that urge as he described in a video how eight Russian missiles completely destroyed an airport in Vinnytsia.

He rebuked NATO for their decision to implement a no-fly zone, saying that it gave Russia a "green light" to strike at Ukraine.

Zelensky said that all the people who will die from this day will die because of you. Because of your disunity.

NATO said a no-fly zone would cause a full-fledged war in Europe and cause much more human suffering.

Russian President Vladimir Putin said on Saturday that any country that tries to impose a no-fly zone will be considered a participant in a military conflict.

It is not possible to do it on the territory of Ukraine. Any movement in this direction will be considered by us as participation in an armed conflict.