11.   His mission would use radar and laser beams to study Europa and perhaps find positive proof the ocean is there.

12.   In a secondary mission, the radars will be used to look for archeological sites along a network of trade routes in northwest China known as the Silk Road.

13.   Investigators have begun using special radar that can see through the mud, and hope to find the cockpit voice recorder.

14.   It may have been the first time that the new surface radar was used in a night battle.

15.   It will use radar to measure rainfall amounts from space, including the Pacific.

16.   Modern-day weather radar did not come about until a century later during World War II, when radar was used to track airplanes.

17.   NASA used enhanced radar for a detailed topographic map of California.

18.   None of the sites had threatened the American or British pilots, either by opening fire or using their radar to track their jets, he said.

19.   Radar was used to search for mass graves in some cemeteries in the area last July, but none were found.

20.   Scottsdale and Mesa started using photo radar last month to ticket speeding motorists and nab drivers who run red lights.