For the second time in two days, a pair of Russian bombers flew close to Alaska, this time coming within 35 nautical miles of the coastline, according to a U.S. official. 
Monday was the first time in more than two years that Russian military aircraft have flown close to the U.S. mainland. 
Two Russian TU-95 Bear bombers flew a path along the Aleutian Islands on Tuesday evening, headed northeast toward the mainland, the official said. 
Though they were flying in international airspace, they entered the U.S. military’s Air Defense Identification Zone, which that extends 200 nautical miles from shore. Unidentified military aircraft are asked to identify themselves while transiting that zone. U.S. airspace extends 12 miles from the U.S. coastline. 
A U.S. Air Force E-3 AWAC aircraft was dispatched from Elemendorf Air Force Base in Anchorage to intercept the Russian aircraft. 
The U.S. aircraft accompanied the two Russian bombers for several hours before they turned back 35 miles from the coast.

Source: QNA