The way it was smothered, also made me think that this might not have been the military's first rodeo. They had some kind of a game plan already together. Remember, there were the foo fighters in WWII and the K Arnold sighting was just two weeks earlier, amongst others. Have to wonder how long this was a contingency?
You have to think that witnesses were absolutely shocked by the turn of events. One moment, playing an important part in American history, the next being threatened by your 'team mates'. There is no doubt that the threats were taken quite seriously. It is still a big desert out there.
What possible motive could persuade these witnesses to fight a 'coverup' till the day they die?
Eisenhower was right. . . . . and there just are too many witnesses
Their contingency plan worked. They just needed a few days to get their act together.
By then people of Roswell had already played around with the wreckage from the debris field. ( Brazel Ranch )