21.   An inquiry is examining whether ground radar, out of service for months while a new system is being installed, could have prevented the crash.

22.   An enquiry is examining whether ground radar, out of service for months while a new system is being installed, could have prevented the crash.

23.   Improved recorders would help determine the cause of accidents and would provide information to help prevent crashes in future, Hall said.

24.   Officials said the ordinance is aimed at preventing deadly crashes caused by drivers dialing or talking on cell phones.

25.   Scott said Parker could have prevented the crash if he had realized his error.

26.   They also were trying to pin down whether ground radar, out of service for months while a new system is being installed, might have prevented the crash.

27.   They were also trying to pin down whether ground radar, out of service for months while a new system is being installed, could have prevented the crash.

28.   With critics in mind, Summers argued Thursday that the bailout prevented a crash of the Mexican economy that also would have hurt U.S. exports.

29.   The outdated NextStep does not provide automatic memory protection, a function that prevents system crashes.

30.   Three senior Air Force officials were relieved of their duties Thursday for failing to order safety inspections of the Dubrovnik airport that might have prevented the crash.