The Marshal Ustinov is one of at least three Russian navy warships that was spotted acting unusually off Ireland's south coast. Photograph: Russian Defence Ministry Press Service via AP Nato’s intelligence chief said that Russia is mapping critical undersea systems and warned of a significant risk that Moscow could target infrastructure in Europe and North America. “There are heightened concerns that Russia may target undersea cables and other critical infrastructure in an effort to disrupt western life and gain leverage against those nations that are providing support to Ukraine,” David Cattler, the military alliance’s assistant secretary general for intelligence and...