The digest headline I received said "U.S. flies mission in airspace east of North Korea" and links to article now titled "U.S. flies bomber, fighter mission off North Korea coast." In the original linked headline, due to line wrapping, "airspace" appeared right over "North Korea" adding to the potential confusion.  Airspace is a territorial word that should  be used carefully and identify "whose" airspace IMHO. https://en.m.wikipedia.org/wiki/Airspace