Not April Fools. Point of Rocks, MD is one of the more known locations on the @officialcsx system, but on April 1, 2019, train K631-31 was lead by @norfolksouthern 8431 (D8-40CW, ex-Conrail 6251). It was also serendipitous to see this unit on April 1, since Conrail was formed on this date in 1976.