Planes can fly in fog. But the pilots are not able to see properly. This could lead to accidents. In general, there are limits regarding visibility and aircraft operations. Airports have been shut down because of fog. There is work underway to develop an infra-red TV that will display the view on the Heads-Up-Display (HUD) so that the pilot can "see" through fog just as if it was a moon lite night.
Airplanes can take off in fog. It is just harder to see, however with modern day radar technology, you could paint the windshield black and still be able to fly.
Airplanes fly because they cant swim.
Airplanes use air for lift and for thrust. If there's no atmosphere, they can't fly. Even a jet engine needs to burn and compress air.
Because cats do not have the capability to fly airplanes.
Because people are not able to fly without a airplanes.
You are unable to fly airplanes, however you can fly helicopters.
airplanes can not but satellites can
Type your answer here... airplanes fly in the stratosphere to avoid weather problems
Some airplanes fly through hurricanes to get wind speeds etc.
Lift makes paper airplanes fly, just as it does real planes.magic
2,000 airplanes fly in the air each day.
They fly.