LONDON: European allies need to overhaul their war-fighting capabilities for a new era of combat, senior military officials from the region said, while warning of the potential threat Russia poses. Speaking at a defense conference in London this week, NATO’s deputy supreme allied commander in Europe, Air Chief Marshal Sir Johnny Stringer, underlined the need to shift to using mass-produced, low-cost equipment such as drones and interceptors, while becoming less dependent on high-end, expensive platforms that can take years to produce.