emergency exercise at Rosslyn metro late Sat. night

An emergency response exercise will begin at Rosslyn metro at 1am on Sunday morning, March 28.  According to Arlington News:

From 11 p.m. [Saturday] to closing, Blue Line trains will share one track between the Foggy Bottom-GWU and Arlington Cemetery Metrorail stations, and Orange Line trains will share one track between the Foggy Bottom-GWU and Court House Metrorail stations. 

Passengers using the Rosslyn Metrorail station and residents in the area should expect to see numerous police, fire and emergency response vehicles, first responders and volunteer “victims” near the station between 11 p.m. Saturday, March 27, and 5 a.m. Sunday, March 28.

This exercise looks a lot like the emergency exercise that was suppose to occur on Feb. 13.