Article Title: US sends "nuke sniffer" toward Russia after nuclear warning issued
Article Excerpt: "...A U.S. Air Force WC-135R aircraft took off from RAF Mildenhall, a major U.K. base in the east of England, before traveling north along the coast west of Norway, according to the flight-tracking platform Flightradar24.
The aircraft, identified by the call sign COBRA29..."
Reference Source: www.newsweek.com