U.S. admiral raises alarm over Russian military threat

Under NORAD operations, the U.S. and Canada routinely send fighter jets into the skies to monitor any Russian military aircraft approaching the U.S. coastline. The Russian operations have not extended to actually flying into U.S. or Canadian airspace, but in the last year Russia is clearly trying to keep a closer eye on NORAD. (www.cnn.com) さらに...