Lesson is not so useless as it may seem at first glance. After all, back in 1983 in the U.S. military wondering what to do in case of death of the Soviet Union, recalled one of the authors of the document P. Schwartz, has long been consulted by the U.S. military. And in 1995, considered the possibility that terrorists used airplanes to attack the skyscrapers of the World Trade Center in New York.