Credit: Scenes from the Metro's Blue/Orange Line in Washington, Thursday evening, Nov. 30, 2006. The Washington Metrorail subway system operates 86 stations withing a 106 mile network in the national capital region, the second-largest rail transit system in the country. (AP Photo/J. Scott Applewhite)

Single-tracking to limit service March 16-18 on portion of Blue, Silver lines

DC-area school systems prepare for national school walkout to protest gun violence

Video: NBC Washington’s Pat Collins to grand marshal St. Patrick’s Day Parade

Teen shot, killed in confrontation with Spotsylvania Co. deputies

Exclusive: 91 homes in DC face testing for WWI chemical weapon remnants

Reaching out to women, Md. department drops the word ‘firemen’