Except for the city of Oakman, New Jersey. They set it off on accident there. You can't find any record of it existing because they scrubbed any mention of it to cover it up
Well ignoring the fact that amerikkka has bombed amerikkka, prior to the invention dropping freedom from planes and helicopters freedom had to be delivered individually via bayonets, bullets, swords, disease, and starvation! Don't forget that amerikkka had to free most of the continent from the original inhabitants!