The operations hub would have been vital to proper handling of the fatal Yellow Line smoke event on Jan. 12.
The 7000-series cars, with advanced technology, will appear first on the Blue Line.
Even in a month traditionally known for it, the wind was notable.
Authorities say the man apparently was struck by a falling tree.
The man held tree branch and was within inches of the officer when she fired several shots, two officials said.
Transportation officials okay with new train cars, but want more information on plans for system infrastructure.
Board members differ on the type of leader needed amid more turmoil for the embattled transit agency.
Officials want assurances the transit agency is fixing its finances and can avoid raising fares.
Officer Brennan Rabain was off duty and in his take-home cruiser when he died, officials said.
D.C. police are investigating the Saturday night homicide in Columbia Heights.