News circling around the wires
Reports have been coming out about a shooter running around and some saying it's just a drill.
Andrews Airforce base near Washington
Update: The base itself has tweeted that it was indeed a training exercise
Update2: Actually it is a real incident as I've just found out reading the whole twitter stream. They were scheduled to run an "active shooter exercise" but they actually had a real incident in the Malcom Grow Medical Facility. See @JBA_NAFW for more.