For those of familiar with tornadoes....we think we understand debris clean up. But it takes F4 or F5 to leave such useless frameworks of structural steel....roof trusses at the High School, the big spans of supermarket roof, the folded water tank and its twisted legs. This is all represents a unbelievable amount of cutting torch work, long after the broken pieces of homes have been loaded onto dump trucks. Large wooden pieces can easily be cut with a simple chainsaw. But climbing onto the minefield of twisted and heavy structural steel, perhaps with many bent pieces storing some spring energy, is very dangerous work, whilst wearing goggles and pulling oxygen and acetylene hoses over uncertain footing! Pray for the safety of these workers, many are volunteers, all have experience, but none regularly work in such an unsafe environment.