via District of Columbia National Guard
From the District of Columbia National Guard:
“Surrounding areas near the Armory may hear emergency-response vehicle sirens & helicopters Saturday during a Joint Medical Training Exercise in Lot 3, RFK Stadium. The joint training is w/ DCNG, @dcfireems & @usparkpolicepio & provides an opportunity to exercise response efforts.”
From AlertDC:
“Saturday, August 7: The DC National Guard, with US Park Police and DC Fire & EMS, will host a Joint Medical Training Exercise from 8 AM to 2 PM in RFK Stadium Lot 3 (1900 East Capitol Street SE) in Washington, DC. Surrounding areas may hear emergency response vehicle sirens and helicopters.”