From the Document: "The National Urban Security Technology Laboratory (NUSTL) executes test and evaluation (T&E) activities and technical advisory support for the Department of Homeland Security (DHS) Science and Technology Directorate (S&T) with a special focus on the assessment of counter-unmanned aircraft systems (C-UAS) technologies. The increasing availability of commercial unmanned aircraft systems (UAS) and rapid advancements in the systems' capabilities have led to more opportunities for both legitimate and nefarious UAS applications. NUSTL's T&E efforts provide direct support to S&T's C-UAS and Air Domain Awareness (ADA) programs. [...] UAS pose significant challenges to air traffic safety and homeland security, as well as potential threats to border security, critical infrastructure and the general public. These challenges have driven NUSTL's efforts in the C-UAS technology area, including T&E execution in support of DHS components and the Homeland Security Enterprise (HSE). In order to detect, track and identify UAS and effectively respond to these threats in a timely manner, law enforcement entities require specialized equipment based on their operating environment and operational missions."
Department of Homeland Security: https://www.dhs.gov/