Science and Technology Directorate | Homeland Security Official websites use .gov .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS lock or means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Countdown to America's 250th Anniversary! 162 Days Hours 47 Minutes notice Due to the lapse in federal funding, this website will not be actively managed. Click here for more information. The Science and Human Impact of Chemical Threats Our podcast is back with a new season! Listen to the Podcast Helping USCG Prepare for a Black Swan Event S&T recently field-tested a new mass rescue flotation device for operations at sea that are outside the standard response range. Read the Article Enhancing Critical Infrastructure through Ammonia Port Preparedness See the Article Assessing Unmanned Ground Vehicles for Emergency Response Read the Article Image Keeping communications clear and resilient against emerging threats. Image Our latest blog post highlights recent R&D collaborations to secure borders, facilitate trade, and protect critical infrastructure. Image Developed by S&T’s National Urban Security Technology Laboratory, the Counter Unmanned Aircraft Systems Purchasing Tool enables state, regional, and local agencies to make informed decisions when selecting technologies to address evolving aerial threats. View Original "S&T’s Month in a Minute for January 2026" video News & Updates News & Updates February 10, 2026 Press Releases Feature Article: Helping USCG Prepare for a Black Swan Event February 06, 2026 Blog Strengthening Chemical Security to Secure Borders, Facilitate Trade, and Protect Critical Infrastructure: A Coordinated Lab Network January 27, 2026 Press Releases Feature Article: Enhancing Critical Infrastructure through Ammonia Port Preparedness and Emergency Response January 26, 2026 Blog Connected When it Matters Most January 20, 2026 Blog A New Chapter for DHS Science and Technology Show me more News & Updates More Science and Technology Image Image Image Image Image Image