Author: Leonid Stepanovich Popov
Alternate names: L. S. Popov; Popov, L. S.; Попов, Леонид Степанович; Леонид Степанович Попов; Попов, Л. С.
Born: 28 November 1940
Died: 6 July 2023
Bio: Soviet aircraft test navigator, Hero of the Russian Federation