Yeah I saw that and looked for mention of the fires, must be related...last night the air quality index at the Edgewood monitor was in the "very unhealthy" category. Not that bad right now.
Here's an article about what's up and APG's "let it burn" policy and why that exists :/
https://www.baltimoresun.com/2024/11/03/fire-aberdeen-proving-ground/
There's probably a discussion raging somewhere about this...if there was testing...if so, why during a state burn ban..idk, I have not seen much news or public info as yet.