NATO allies have centralized their air operations into a small number of combined air operations centers, and that needs to change, a top official said. Staff Sgt. Elizabeth Davis/US Air Force The West's long-enjoyed luxury of having large command centers can't continue, even though it will make work more difficult, a top NATO commander told Business Insider. The West has, for decades, operated out of large air operations centers, Air Chief Marshal Sir John Stringer, NATO's Deputy Supreme Allied Commander Europe, told BI. "If we're honest, a lot of it still looks like it did towards the last decade, two decades even with the Cold War." But that can't continue as the number of threats in the air grows , he said."The sense of the big single air operation center, which a lot of people have grown up with over the last sort of 35 years — probably first seen at scale in the Gulf War in 1991 — through to the fixed command and reporting centers, that's going to have to change," Stringer said.…