A French National Railway Class 21000 electric awaits a test run in the coach yard at the 
main Amtrak station in Philadelphia, Pennsylvania (USA). Amtrak brought the SNCF unit and a Swedish State Railway Rc4 to the U.S. to evaluate them for possible use. The company selected the Rc4 design and the contracted with locomotive builder EMD to build 47 of them under license as the AEM7. 1976 Photo by Thomas McCann (USA) (mediabymccann@att.net)