[I found this very interesting photo on a Charlie Chaplin website to day:
Members of United Artists at United Airport in Burbank, July 1933
L-R: Ed Finney, Hal Horne, Walt Disney, Al Lichtman, Mary Pickford, Charlie Chaplin and Joe Schenck.
The first four were heading to Chicago for a convention of film exhibitors.
Link to the blog posting for details and identification:
Futher information about the four lesser known persons on the photo:
Edward Finney (1903 - 1983), film producer.
Hal Horne (1893 - 1955), publicity director for UA (and later a publisher).
Al Lichtman (1888 - 1958), businessman and film producer.
Joseph M. Schenck (1878 - 1961), Russian-born film studio executive.]