1.   And while crashes of airline flights get the most attention, general aviation is usually deadlier.

2.   As long as general aviation, military and commercial jets have no restrictions, none of the park can enjoy natural quiet.

3.   At many airports general aviation owners or customers face little if any security screening.

4.   At a time when the crash rates of commercial airliners and general aviation are declining, the crash rate for government-owned airplanes is rising.

5.   Businesses relying on general aviation are also hurting.

6.   But officials are still groping for a way to control the sprawling general aviation system.

7.   But others in the general aviation industry said the violations were no indicator of pilot ability.

8.   But there have been few changes in security surrounding general aviation, and industry officials say none are necessary.

9.   Fixed-base operators provide services such as fueling, ground handling, and maintenance to general aviation customers.

10.   For now, the technology is being tested only on cargo planes flying between certain hub airports in the Midwest and on small general aviation aircraft in Alaska.