Here’s a great video produced by the DHS Center of Excellence, ALERT, or Awareness and Localization of Explosives-Related Threats (what is it about engineers and acronyms?!). ALERT 101 is a new series featuring the center’s unique technologies and research areas. This one explains millimeter wave and back scatter airport screening systems. For more info on the first, check out this post that I wrote back in March and listen to professor Carey Rapport discuss it on Academic Minute. Enjoy!