The reason firehouses have circular stairways is from the days of yore when the engines were pulled by horses. The horses were stabled on the ground floor and figured out how to walk up straight staircases.
US forces fire bombed japan's wooden cities totally destroying 58 % of Yokohama (the size of Cleveland)
51% of Tokyo (new York) 99% Toyama (Chattanooga) 40% Nagoya (LA) killing 50-90% of the population in 67 Japanese cities BEFORE two nuclear bombs were dropped.
There are 3 classifications of burns. a) First degree burn only involves the outer layer of skin. b) Second degree burn involves several layers of the skin tha become blistered. c) Third degree burn is all layers of the skin,underlying tissue and organs. Nerves are damaged and sometimes destoyed.