The man standing on CC's right is Colonel Clarence Marshall YOUNG, future executive vice president of Pan American World Airways. Here's a link to a photo of YOUNG and Charles LINDBERGH: www.flysfo.com/museum/aviation-museum-library/collection/17708D.
thanks for the info!
is that Keaton next to him?
Dominique answered your question above. That man does look a little like Keaton though.