May 1st, 2015 is a special day for Norfolk Southern's 21st Century Steam! steam program, as it was that day that Southern 4501 returned to the mainline. It was not an excursion, but instead her 'shakedown' run. Southern 630's shakedown run involved diesel assistance, but Southern 4501 strut her stuff pulling a nine car train, without diesel assistance. I'm torn between one of two videos showing 4501's shakedown run, so I'll post one of the videos on this post and then post the other on a second post to this thread.