The first link malfunctioned. Here are the links again. <A HREF="http://hosted.ap.org/dynamic/stories/N/NUCLEAR_DETECTORS?SITE=VALYD&SECTION=HOME&TEMPLATE=DE..." target="_blank">http://hosted.ap.org/dynamic/stories/N/NUCLEAR_DETECTORS?SITE=VALYD&SECTION=HOME&TEMPLATE=DE...</A>. <A HREF="http://www.nv.doe.gov/library/FactSheets/DOENV_1061.pdf" target="_blank">http://www.nv.doe.gov/library/FactSheets/DOENV_1061.pdf</A>