Some passengers on the Red and Orange lines will wait longer for trains this weekend.
Metrorail will operate into the early hours of Tuesday to accommodate FedEx crowds at Redskins' preseason game.
A train was disabled at Virginia Square.
Trains stopped for a brake problem.
Authorities said 15-year-old transgender teen was wounded in the attack and a man was arrested at the Fort Totten station.
Unidentified woman who apparently fainted on Farragut West platform was pulled from tracks by others in the station.
Signs at only a handful of stations will always display next Blue Line arrival times.
Dennis Anosike replaces Carol Kissal, who resigned as Metro's chief financial officer after a critical audit report.
No scheduled disruptions along new line's route.
After simulating Silver Line service all day Sunday and Monday morning, transit authority says the new rail route is glitch-free so far.