The DSE came under pressure after the British intervened, sending tanks, airplanes and ammunition to the government forces, which were mainly stationed in cities.

At a recent industry meeting on setting priorities for air safety, one executive said that there was no choice now except to implement new security measures, even if other problems were more important, like navigation errors that send airplanes into mountains.

The United States has been sending airplanes over the region, but after a plane was apparently shot at on Wednesday, flights were suspended.

Almost 29 years to the day that David died, hijackers sent airplanes into the World Trade Center and the Pentagon, and another plane crashed in western Pennsylvania.

Mexico established a special air route to the affected areas and sent airplanes, helicopters and military ships to transport medicine and food.

"I'd send airplanes with antisurface missiles, or get the submarine up there, and sink it now."

In any event, the army shut down all aviation training at Fort Sam Houston and sent pilots and airplanes to College Park, Maryland, where its first aviation school was about to commence.

They sent airplanes armed with grenades to chase the zep- pelins.

Several nearby countries sent airplanes carrying medicine and food.

General Abacha sent warships to blockade the rebels, starving their economy, and airplanes to bomb the insurrectionists' positions.