The history of Civil Defense and Yegor Letov lends itself with great difficulty to a detailed and objective description, and even more so in such a small book. Letov has been confusing traces for so long that studying his phenomenon becomes equally exciting and difficult. The present is intertwined with the past, the future, which does not seem to exist, also does not give an answer, quotes taken out of context seem alien, as a result, there remains a trace of an airplane that has long and irrevocably flown into unknown distances.