[lemma=chemical] □ □
[lemma=chemical] □ □ □
[lemma=chemical] (□ | □) □
This visual tool used in conjunction with HPAC allows investigators and planners to " see " where a chemical or biological agent will disperse and which populations will be exposed . He is the driving force for an unparalleled transformation of the nation ’ s chemical and biological defense capability . Or it could mean that a chemical or biological weapon has been released . His vision in forecasting the opportunities reflected in the National Nanotechnology Initiative to establish the Naval Research Laboratory ( NRL ) Nanoscience Institute , acquiring funds from MILCON support , has provided a number of advances in sensors , detectors and chemical and biological defense , advances in nanoelectronics for the Navy and Marine Corps applications with singular success by bringing multidisciplinary efforts focused on optical , electronic , magnetic and structural materials development to provide transformational technologies to the Navy . U.N. inspectors working from 1991 to 1998 found and destroyed essentially all Iraqi chemical and biological weapon production facilities and a very substantial portion of the weapons ( the exact portion remains controversial and unknowable until on-the-ground inspections resume and operate for six months or more ) . In a chemical or biological accident or attack , city officials would send NARAC the coordinates of the toxic release .