6 ms·
See also: http://www.johnstonsarchive.net/nuclear/radevents/1954USSR1.html http://www.johnstonsarchive.net/nuclear/radevents/1954USSR1....
by DCoder 11y ago
See also: http://www.johnstonsarchive.net/nuclear/radevents/1954USSR1.html http://www.johnstonsarchive.net/nuclear/radevents/1954USSR1....