And here's my big embarassing question, where are the eyewtiness statements from the military pilots in the helicopter and the fighter jet?
Unless they were looking at the plane BEFORE the initiating event, they would never see the explosion. Sound travels at a set rate. At 21 degrees C (70°F), you should get 344 meters per second, or 1129 ft per second. If they heard, then looked, they were at least 1 second late. They were liekly more than 1100 feet fronm the plane when the incident started.
There are any number of mechanical failures that can result in fire around an engine. The basic question on this accident is "What can cause the tail and both engines to detach from the aircraft?"