I have been watching a bunch of old music from the 1940s to the 1990s and stumbled on the videos of Chet Atkins. My question is what song is he playing on the 2:53 mark of the video? Can't seem to find the song as the comments are disabled and there are no description by the uploader. Thanks!

Here is the link for the video https://www.youtube.com/watch?v=OsjC9VmGnpM