That 's a 20 % increase in Russian air activity over last year , secretary general says . Russian planes are not following air traffic control norms , Jens Stoltenberg says . ` ` This move is risky and unjustified , '' he says . And we are ready to defend all allies against any threat , '' he said at Amari Airbase in Estonia , where U.S. , German and Estonian troops were gathered . Stoltenberg , who 's on a trip to the Baltics , says he is n't idle as Russian activity increases .
That 's a 20 % increase in Russian air activity over last year , secretary general says . Russian planes are not following air traffic control norms , Jens Stoltenberg says . ` ` This move is risky and unjustified , '' he says . Stoltenberg , who 's on a trip to the Baltics , says he is n't idle as Russian activity increases .