Look at the guy in the picture second from the right in the rear row. I think it's Underscore Jim -- an inerrant indication of somethin' conspiratorial.
Nah, the CAP folks of the period were mostly former military, with useful skills. The second-stringers and chair-warmers used in the Dallas job never even knew they were going to get their chance until New Years day of 1963, as backups in case the plans to hit JFK in Chicago and Miami failed or were uncovered- as they did and were.
