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drone control panel is in hand of military soldier. artillery spotter or military observer launches drone into sky force reconnaissance in enemy territory. Modern technological reconnaissance warfare
Back view of multinational people looking at the city. Global business concept.
Engineers are watching over the work of wind turbines and virtual data. 3D illustration
A periscope is an optical instrument with mirrors or prisms, allowing observation over, around, or through obstacles by reflecting light.
Four medical students in white coats are practicing CPR on a mannequin in a classroom setting. A woman in black clothing observes the training session.

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