Federal official raises concerns about safety on new Metro line
http://www.washingtonpost.com/local/trafficandcommuting/concerns-raised-about-metro-train-control-system-on-new-rail-line/2013/06/13/68d86bf2-d452-11e2-b05f-3ea3f0e7bb5a_story.html
http://www.washingtonpost.com/local/trafficandcommuting/concerns-raised-about-metro-train-control-system-on-new-rail-line/2013/06/13/68d86bf2-d452-11e2-b05f-3ea3f0e7bb5a_story.html