I'm presently at the foot of M Street in Washington DC, down the street from the Washington Navy Yard. The Yard is in lockdown with local and federal law enforcement swarming all over the area. Unconfirmed reports are that there is - again - an active shooter somewhere in the yard.
For local news accounts this would be the best link to WUSA*9. This is all I can add for now. Will try to update as I learn more