I also saw a home video on the Discovery Channel (which is usually as reputable as basic cable gets), of the guy, who was the commander of the 509th back in 1947, stating that,

"No-way, no-how was that a weather balloon... I'll tell you, it was however, the damndest thing that I have ever seen."

The ex-commander died shortly after the filming of the home video... of natural causes, or so they say...

This of course gives no inclination as to what actually crashed in Roswell, but my own theory is that it was a killer Japanese Balloon Bomb.