if you would like to watch about 10 minutes of Richard Nixon performing karaoke, then I would suggest going to my youtube to get in on the fun: https://www.youtube.com/watch?v=BB-8c0ueTy4
Building Washington Metro on the B&O by Marty Bernard
Via Flickr:
The double tracks on the B&O mainline which runs northwest from Washington, DC were moved farther apart and the two Metro tracks laid between them as these two photos show. You can see the mounts for Metro's third rail.
These two photos are of B&O's torpedo GP9 6603 with Commuter Train #61 passing through Silver Spring, MD on May 24, 1977.