For your information the camp David skeet range it surrounded by a wooden fence. That pic was taken at target range.
Camp David Skeet Range Layout. (Its typical half moon skeet club layout)
The little path that looks like a landing strip (uper right) looks like a target shooting area. (No skeet launch there) this is where pic was taken
http://3.bp.blogspot.com/_7xEZf2ej1r8/THwdBTLXXZI/AAAAAAAAAJ4/LTp6WojPmIw/s1600/skeet-range-map.jpg
The skeet area has a wooden fence around it, benches, shooter set up tables ec. Pic below Kennedy at skeet range camp David.
Another pic (notice wooden fence)
http://1.bp.blogspot.com/_7xEZf2ej1r8/THwQmTPpAjI/AAAAAAAAAJo/RIggp95YV5Q/s1600/ike-bush.jpg
I think Obama pic was staged at target range. Just a guess of course! Or Obama shot a clay pigeon crossing the road.
You realize that photo was taken 50 years ago. Does your backyard look the same as it did 50 years ago?