At first I was thinking DC, but the Smithsonian's main exhibit halls and the Library of Congress are there. More seriously, Antarctica is probably a good choice but seems like it would be difficult to get the angles right for a polar approach. Looking closer to the equator gives several desert areas that would probably not take much note of a new crater and a few days of extra dusty air.As long as they don't mess up the calculations and drop it on a cultural site that sets off a holy war it's probably fine. On top of someones "secret" illegal weapons program site would be darkly hilarious, but that kind of precision seems unlikely with a randomly shaped rock of unknown and uneven composition.
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‎noli esse culus
‎noli esse culus