
Nation, World Briefs: Problems found on D.C. Metro tracks
WASHINGTON -- Investigators are looking more closely at a stretch of track near the site of a deadly Metro commuter train crash after finding abnormalities Wednesday in equipment that senses trains and transmits speed commands. Equipment along a 740-foot stretch of track failed to recognize a device that simulates the presence of a train during the tests, said the National Transportation Safety Board, which is leading the investigation into the crash that killed nine people. Five other stretches of track, or circuits, near the Maryland state line showed no problems.