The Deepwater Horizon incident declared a Spill of National Significance (SONS). A SONS is defined as "a spill that, due to its severity, size, location, actual or potential impact on the public health and welfare or the environment, or the necessary response effort, is so complex that it requires extraordinary coordination of federal, state, local and responsible party resources to contain and clean up the discharge," and allows greater federal involvement. Commerce’s National Oceanic and Atmospheric Administration (NOAA) is assisting the Unified Command in evaluating a new technique to apply dispersants to oil at the source—5000’ below the surface. If successful, this would keep plumes and sheens from forming. (More) (NOAA-Deepwater) (Trajectory map 1—PDF) (IncidentNews: Deepwater Horizon)