Denis Pushilin emphasized that the "gray zone" is continuously shifting due to the widespread use of drones DONETSK, April 25. /TASS/. The concept of the "gray zone" in Donbass has taken on a new significance. Its movement along the front line is increasingly influenced by the active deployment of drones by both sides, DPR leader Denis Pushilin explained in an interview with TASS. The meaning of the "gray zone" has evolved in light of drone technology. "Visual control doesn’t equate to complete