I just added a post about B-17F 42-30921 that obscurely was on the U.S. civil register in 1950 as N5723N before going to Bolivia as CB-71. It also had an interesting AAF service in development work of radio-control drones/targets/bombs between 1943 and 1946.
Wish we could find somebody knowledgeable about Bolivia aviation - this country has had one of the largest B-17 fleets during the 1950 ~ 1960 with a lot of them crashing in obscure parts of jungles and valleys with many never recovered....
Would be an interesting expidition to recover some of these ships (some with combat histories).