From a press release:
“Metro has temporarily closed the 10th Street entrance of the U St/African-Amer Civil War Memorial/Cardozo Metrorail station on the Green Line for emergency maintenance needed on the entrance escalators. The station remains open and customers can use the 13th and U Street entrance.
Metro officials closed the 10th Street entrance at 3:05 p.m. Metro’s Department of Elevators and Escalators is on scene and making the necessary repairs.”
Though it doesn’t say when this exit will reopen…
Update: The escalator has been fixed and the entrance has reopened. That was pretty fast!