EAGLES ON AN ICELANDIC RUNWAY: Four USAF F-15C/D Eagles line up on the runway Keflavik Air Base, Iceland. According to the caption the F-15s are preparing for a routine NATO air policing operation. Photo taken Oct. 26, 2020. Air policing means securing sovereign air space against intruders. It’s not a new term. The F-15 interceptors based in Iceland can cover a huge area — Britain, Norway, Svalbard, Greenland and the Arctic approaches to both North America and western Europe. You will occasionally see the term NATO enhanced Air Policing missions. It has its own acronym: eAP. NATO has been flying air policing missions over the eastern Baltic Sea since 2004. At this link you’ll find a column addressing a very serious probe of Danish air space that occurred in June 2014.