Did yall know that when parts of Skylab hit Australia, they fined the US for littering? LoL Yeah... and we never paid the fine! Oops. LoL
It's hard to pinpoint an exact date and time because of atmospheric drag. Yes, the military could be brought in on things if it looks dangerous, but you will probably never know about it. As a matter of fact, the military is probably already setting something up... we do not want other countries to get their hands on our spy technology. Most all satellites are put in orbit to end up in the Pacific, if it comes down in a controlled de-orbit... and uncontrolled de-orbits about 90% of the time should end up there, as well... that's the drop zone. (That's where the Hubble Space Telescope will end up... in the darn ocean... grrrrrrrrrrrrrrrr!!!!!)