One problem with Earth-to-Earth is noise. A quick google tells me Saturn 5 was 220 decibels. So it has to be sea launches or desert launches. Also, Concorde

One problem with Earth-to-Earth is noise. A quick google tells me Saturn 5 was 220 decibels. So it has to be sea launches or desert launches. Also, Concorde couldn't go supersonic until it was significantly out to sea.