The airport manager was killed and two other civilian planes did not return that morning.

Federal officials have been worried about missile attacks on civilian planes since the late 1990's.

Admiral Crowe said the military data played a role in the decision to down the civilian plane.

Instead, the report showed that it was inside a 20-mile-wide corridor but off the center line flown by most civilian planes.

"You don't like the idea of hijacking a civilian plane?"

One signal was appropriate to both civilian and military planes.

A civilian plane is typically flying at an altitude of 25,000 feet or more.

The civilian planes can go places American military craft would not be welcome.

With its relatively small apron, the airport is only able to serve up to 6 civilian planes at the same time.