The Dome or Upper Firmament and the humongous and life-giving Tree of Life
were actual components of our Flat Earth before being destroyed or cut down by the Luciferic forces


Those two components were obliterated or severely damaged in an ancient nuclear war the detonations, which oddly enough, resemble a tree or mushroom(atomic bomb) and a dome(hydrogen bomb)
It's been postulated that God may have used nuclear weapons(fire and brimstone) to destroy Sodom and Gommorah. Huge plumes
of smoke arose after the destruction. Apparently, nothing is new under the Sun, including our current technology.