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.
24. Wasp Prime atomic bomb testing blast in 1955.
