There's
no crater left today, just a 2 - metre lava - rock obelisk, a few historical photos on a chain - link fence and a single stump of the steel firing tower that held the bomb, which was code - named «the gadget».
Mark Boslough says a comet of the size required for the impacts in these papers would have drilled through the ice,
leaving a visible
crater, and being so recent, might be still steaming
today!