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@@ -20,6 +20,7 @@ Here we'll collect information on helicopters who occasionally fly over DC, but
 * Details: In 2012-2013, a Department of Energy helicopter operated by the [National Nuclear Security Administration](https://en.wikipedia.org/wiki/National_Nuclear_Security_Administration) flew a systematic grid over Washington DC to detect the background radiation in order to establish a baseline that could be compared against in time of emergency.  The program is known as the Aerial Measuring System.  I recalled seeing it from my office at the time, flying very low and in a tight grid.  The testing flights [continue to take place](https://www.google.com/search?q=%22The+U.S.+Department+of+Energy%E2%80%99s+National+Nuclear+Security+Administration+(DOE%2FNNSA)+will+conduct+low-altitude+helicopter+flights%22+site%3Aenergy.gov) in various US cities and may recur in DC at some point.  
 
 * Links:
+  * [@helicoptersofdc Video - Nuclear Safety Administration Photography Mission 10/22/24](https://www.youtube.com/watch?v=f3IjhRN03fQ)
   * [Department of Energy in 2021 GAO Washington, D.C. Area Helicopter Noise Report](https://hyp.is/IcjFphV0EeypBUfrWozaWw/www.gao.gov/assets/gao-21-200.pdf)
   * [CBS News - Nuclear Security Helicopters Testing Radiation Levels Above DC Area](https://washington.cbslocal.com/2013/01/05/nuclear-security-helicopters-testing-radiation-levels-above-dc-area/)
   * [Full Text of the NNSA Press Release](https://www.ladailypost.com/content/nnsa-conducting-radiation-survey-over-washington)