11.   But Thursday night the system failed so fast that the controllers had no opportunity to act, and they lost primary and secondary radar.

12.   Controllers do have some new tools to handle all the traffic.

13.   During the failure, the controllers had to use a backup radar system that displays much less information than the main system.

14.   Hardy said air-traffic controllers have the duty to report any incident that makes them uneasy.

15.   If controllers have to rely on handwritten notes, they can slowly rebuild the system by keyboarding the information back in.

16.   Its body is so wide and tall that tower controllers may have to ban aircraft from nearby runways and taxiways before the plane lands or takes off.

17.   NASA flight controllers have the option to order evasive maneuvers by a shuttle crew.

18.   Most constituencies think the new arrangement is going well, though controllers are having some second thoughts.

19.   Pay is good and the controllers may have mortgages to pay off or college tuition bills for their children, Brown said.

20.   The controllers then had to write all the information by hand and carry the strips around the room as planes moved from sector to sector.