Curiosity is a natural human feature. First air balloons and then airplanes significantly expanded abilities to have this curiosity satisfied. But very soon, careless curiosity gave way to mercantile interest. In deed, in the time of war flying above, one can have a bird’s view of the entire position and sometimes of the intentions of the enemy.

Bonus material: R-1, R-3, R-5, R-Z, R-6, R-10, МBR-2, Тu-2R, Su-12, МiG-15Rbis, Il-28R, Yak-25R, Yak-27R, Tu-16R, NM-1, R-020 ‘Igla’, Yak-25RV, Yak-28R, МiG-21R, Тu-22R, Тu-95RTs, La-17R, Тu-123, МiG-25RB, Il-20, Аn-30, Su-17М3R, Su-24МR, Тu-126, А-50, Тu-143, Тu-141, Yak-060, М-55.