The transit system’s board voted to ban them after a group tried to place ads featuring a Muhammad cartoon.
The ban comes as an anti-Muslim group planned to put a cartoon of the Prophet Muhammad in transit ads.
Buffeted by criticism over service problems and money troubles, the agency wants “world-class” help.
Federal transit officials have yet to decide whether Metro can replace older subway cars with new ones.
The expected grand jury action leaves the most significant charges in the case unchanged.
The state says it has other ways to test that particular skill, but some driving teachers are scoffing.
The immense toll of the unrest, and its root causes, are distilled on the four corners of West North and North Smallwood.
The closing of Metro Center late Monday evening capped a problem-packed day for the transit agency.
An arcing insulator at the Foggy Bottom station caused reports of smoke extending to Rosslyn.