That 's a 50 % increase in Russian air activity over last year , secretary general says . Russian planes are not following air traffic control norms , Stoltenberg 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 . `` This pattern is risky and unjustified , '' he says . Stoltenberg , who 's on a trip to the Europe , says the Karmelava Airspace Control Center is n't idle as Swedish activity increases .
That 's a 50 % increase in Russian air activity over last year , secretary general says . Russian planes are not following air traffic control norms , Stoltenberg says . `` This pattern is risky and unjustified , '' he says . Stoltenberg , who 's on a trip to the Europe , says the Karmelava Airspace Control Center is n't idle as Swedish activity increases .