Searchlights, however, were another story. The Germans at Stalingrad developed what the Russians called a "flak circus". They would bring out the flak guns that had been hidden during the day, and lay them in concentric circles around probable targets, and the same with the searchlights. Po-2s crossing the perimeter in pairs in the straight line flight path typical of untrained but determined Russian flyers were usually ripped to pieces by the Flak 37 guns. The 588th, however, developed another tactic. They flew in formations of three. Two would go in first, attract the attention of the searchlights, and when all of them pointed to them in the sky, separate suddenly in opposite directions and maneuver wildly to try to shake them off. The German searchlight operators would follow them, while the third bomber who was farther back snuck in through the darkened path made by her 2 comrades and hit the target unopposed. She would then get out, rejoin with the other two, and they would switch places until all three had delivered their payloads. It took nerves of steel to be a decoy and willingly attract enemy fire, but as Nadya Popova said: "It worked."