As reported by Censor.NET, this was announced by Air Force Secretary Deborah James in an interview to Reuters at the annual Reagan National Defense Forum.
Russia's increasing military activities around the world have unsettled top U.S. military officials, who say they are reshaping their budget plans to better address what they now consider to be the most pressing threat to U.S. security.
"Russia is the No. 1 threat to the United States. We have a number of threats that we're dealing with, but Russia could be, because of the nuclear aspect, an existential threat to the United States," Air Force Secretary Deborah James told Reuters.
James, Chief of Naval Operations Admiral John Richardson and Pentagon chief arms buyer Frank Kendall, all voiced growing concern about Russia's increasingly aggressive behavior in interviews late on Saturday.
Their comments come as the Pentagon finalizes a classified security assessment for President-elect Donald Trump, who has promised to both pump up U.S. defense spending and build closer ties to Russian President Vladimir Putin.