21. Mass swim in honor of Soviet Navy Day, Sevastopol, 1949.
The inscription under the portrait: Glory to the Great Stalin! Photo of the Soviet photojournalist Alexander Vasilievich Ustinov.
22. Airship (Zeppelin) construction hall at Friedrichshafen, Germany, 1928.
23. A Soviet army crew clears off the highly radioactive debris from the roof of reactor 3 at Chernobyl Nuclear Facility in a time limit of 90 seconds.
The extreme levels of radiation, nearly 40 times the lethal dose, restricted each crew to only one use, 1986.