Neutron detectors are used in homeland security to improve the identification of special nuclear materials (SNM). The detection of any neutrons above the natural background is a strong indication of SNM presence. Currently, there is a significant dependence on He-3 tubes for neutron detection. These devices are simple and effective detectors; however they have a number of drawbacks. He-3 tubes are pressure vessels and cannot be brought on board an airplane. They also exhibit micro-phonic effects, which are a serious issue for the handheld instrumentation. The last but not least is a diminishing stockpile of the He-3 gas, which stimulated the recent push to create new neutron detection technologies. In the last few years, RMD has developed a Cs2LiYCI6 (CLYC) scintillator that offers (1) efficient thermal neutron detection, which is higher on a per-volume basis than that of He-3; (2) excellent gamma rejection ratio (GRR), better than 1x10-7; and (3) gamma-ray energy resolution as good as 4% at 662 keV.