From hstoday.us. Unifying Research: DHS S&T Hosts Virtual Whole-of-Government R&D Showcase. The Department of Homeland Security (DHS) Science and Technology Directorate (S&T) is convening U.S. government research organizations for the Virtual Whole-of-Government R&D Showcase, a unique four-part virtual content series that kicks off today and will run through August. The showcase will highlight how S&T and its partners across government are mobilizing research and development (R&D) teams to reduce risks from natural and human-induced disasters; accelerating breakthrough discoveries; and helping the nation prepare against future threats and unknowns.