Live activity Washington D.C. police, fire, EMS:
http://www.broadcastify.com/
http://www.broadcastify.com/listen/feed/2455/web
Lots of activity as of 10:00 AM eastern time.
The first responders have called in their “mass casualty group” of responders. This does NOT mean there are mass casualties.
News says 5 people shot and are in critical condition. But I’m sure the details will change several times before it’s all over.