No Fly Zone

What is a no-fly zone?

China's no-fly zone disregards norms: experts - Taipei Times

Poll: International Relations Experts Oppose No-Fly Zone Over Ukraine

No Fly Zone: What Happens When Aircraft Gets Into Air Exclusion Zone?

FAA declares YUGE, glamorous no-fly zone over NYC's Trump Tower

Why the Ukraine No-Fly Zone Won't Ever Happen

What would a 'no-fly zone' mean in Ukraine?

Implementing the no-fly zone

No-fly zones: where your airline cannot go - Telegraph