The FAA will reduce air traffic at 40 airports following the staffing shortages among air traffic controllers.

Plane Hits Weather Balloon FILE - The United Airlines logo can be seen on a rope line at O'Hare International Airport, May 17, 2011. (AP Photo/Brian Kersey, File ...

FILE - The United Airlines logo can be seen on a rope line at O'Hare International Airport, May 17, 2011. (AP Photo/Brian Kersey, File) (Brian Kersey, Copyright 2011 ...

FILE - The United Airlines logo can be seen on a rope line at O'Hare International Airport, May 17, 2011. A United Airlines plane appears to have collided with a weather balloon while cruising over ...

A recent United Airlines emergency landing appears to have been the result of a collision with a weather balloon over Utah FILE - The United Airlines logo can be seen on a rope line at O'Hare ...

The flight reductions begin with Friday's flights. There's no word on how long they'll last, and but a worrisome sign is that there's no end in sight for Congress to act to end the government shutdown ...

FILE - The United Airlines logo can be seen on a rope line at O'Hare International Airport, May 17, 2011. (AP Photo/Brian Kersey, File) A United Airlines plane appears to have collided with a weather ...