article_snippet: Tension with Russia extends to the air too.
article_snippet: Adm. William Gortney, commander of the North American Aerospace Defense Command, told the Senate Armed Services Committee on Thursday that "this past year has marked a notable increase in Russian military assertiveness.
article_snippet: Russian heavy bomber aircraft flew more patrols outside Russian airspace "than in any year since the Cold War," though " did not offer a specific number.
article_snippet: There have also been increased Russian air patrols across the coastlines of Europe.