Russia may be deploying a network of small jamming devices to disrupt global positioning system (GPS) signals following interference that affected the UK defence secretary's flight from Estonia. On May 21, a Royal Air Force jet carrying John Healey flew for three hours with its GPS disabled after departing southeast Estonia, according to a Times reporter on board. The jamming disrupted some of the Dassault Falcon 900LX’s cockpit instrumentation and blocked onboard internet access, forcing pilots to rely on inertial navigation using motion and rotation sensors to track position. Healey had been visiting British Army 4th Light Brigade personnel near Võru in southeast Estonia, where they were training alongside Estonian forces during Spring Storm 2026, an annual exercise that this year involved more than 12,000 troops from Estonia and allied nations. The incident is not isolated.…