distance with a lethal dose of radiation. the fbi says the men had specific targets in mind, including president obama. more from abc's pierre thomas. >> reporter: we have seen death rays in science fiction movies. but the fbi charged two upstate new york men, eric fite and glen crawford, a self-described engineer and klan member with building a workable death ray. >> this particular device would be capable of emitting x-ray radiation. this device would have been capable of doing that and killing people. >> reporter: the murderers' plan allegedly called for attaching an industrial-grade x-ray machine to a specially designed triggering device stored in a truck. the weapon would be mobile, shooting concentrated doses of radiation on unsuspecting targets who would die within two weeks. among the potential targets, sources say, muslims and president obama. police say they were tipped off after crawford allegedly went to an albany synagogue asking for help with a device he called