NOTE TO EVERYONE: Andrews isn't the only airfield with military capability within the WARSHDC METRO REGION.
We usually know when the end of the world stuff is happening just by listening for the jets taking off UNDER the power lines. Always a sign.
Here you can tell if you see all the KC135s taking off in 20 sec intervals. They are from the 171st going to meet the BUFFs on their way to the failsafe points.
Same if you are at Fairchild AFB and you see a bunch of B52s rolling out at the same time.