CNN news networking quoted a US military official saying that Russian military warplanes flied off coasts of Alaska state in the North Pole yesterday، Thursday. The networking adds that yesterday flight is the fourth tine the Russian planes flied off Alaska coasts in four days. The official pointed out that this matter does not pose a true threat to the USA. US military noticed more frequency of Russian flights throughout later days. On its side، the Russian Defense Ministry said it directs regular flights over the international waters in the North Pole، the Pacific and Atlantic Oceans along with the Black Sea. The ministry assured that those flights don abuse sovereignty of the other states as they abide the international rules.