<Dl> <Dd> National Center for Computational Toxicology, National Center for Environmental Assessment, National Center for Environmental Research, National Exposure Research Laboratory, National Health and Environmental Effects Research Laboratory, National Homeland Security Research Center, National Risk Management Research Laboratory </Dd> </Dl> <Dd> National Center for Computational Toxicology, National Center for Environmental Assessment, National Center for Environmental Research, National Exposure Research Laboratory, National Health and Environmental Effects Research Laboratory, National Homeland Security Research Center, National Risk Management Research Laboratory </Dd> <Ul> <Li> Office of Land and Emergency Management (OLEM) </Li> </Ul> <Li> Office of Land and Emergency Management (OLEM) </Li>

The executive office of the president was created for what primary reason