The challenge of obtaining an adequate environmental support system to help mitigate the effects of various terrorist generated plumes is articulated and a fiscally responsible solution is presented. A substantially improved national system of upper air data observing systems serves as a powerful information source prior to a terrorist event. A mobile tactical observing system for measuring the environment and for measuring the composition and intensity of the plume is implemented immediately following an event. Only proven and tested technologies are used. Program costs, benefits for the fight against terrorism, and multiple benefits to other aspects of the economy are summarized.