They have "LASERS"

Yahoo! News:

Authorities are investigating a mysterious laser beam that was directed into the cockpit of a commercial jet traveling at more than 8,500 feet. The beam appeared Monday when the plane was about 15 miles from Cleveland Hopkins International Airport, the FBI (news - web sites) said. 'It was in there for several seconds like (the plane) was being tracked,' FBI agent Robert Hawk said. The pilot was able to land the plane, and air traffic controllers used radar to determine the laser came from a residential area in suburban Warrensville Heights.

Interesting. How though, do you use radar to determine where a laser came from?