(CNN) — Here’s a look at Washington, DC’s subway system, generally called the “Metro.” The Washington Metropolitan Area Transit Authority operates Metrorail, the third largest heavy rail system in the ...

The Washington DC metro system may not have the storied history of some of the country’s other subterranean trains. Still, any newcomer to the city will be pleased with its efficiency and convenience.

— -- The entire Washington, D.C., subway system was closed for emergency inspections, causing commuters in the nation's capital -- a city largely reliant on its metro system -- to struggle to ...

Earlier today a woman in Washington, DC, gave birth to health a baby boy in — of all places — the L'Enfant Plaza station of the city's Metro system. The woman was traveling on a Green Line train ...