More arcane information: A USMC Cessna OE-2, a mishmash of parts but a good performer with a 265-hp O-470-2 engine. Only 27 were built. Note the hard point and the pilot's gun sight.
http://i1047.photobucket.com/albums/...SSNA%20OE2.jpg

Megan, thanks for the positive and correct ID of the Cessna. I had to shrink the original pic for posting purposes above - however, I pulled out the original, and blew it up as much as I dared (133%), and then cropped the photo to produce this zoomed-in view of the Cessna (below).

Unfortunately, the original photo wasn't particularly clear, due to the aircrafts speed, and the need to catch him in the lens quickly - and then 30 years of poor 35mm slide storage did nothing to help the photo quality, before it was scanned in 2000.

http://oi67.tinypic.com/n2oqap.jpg