Russian military aircraft activity near the United States and Canada has sharply increased this year, prompting North American Aerospace and Defense Command to scramble 14 times since January on intercept missions -- more than twice the annual average and one shy of the post-Cold War peak of 15 Russian sorties in 2014, according to recently declassified information. New details of Russian military activity in NORAD airspace is a result of a 2018 policy decision to provide more transparency regarding such...