Russian surveillance aircraft entered Alaskan air defense identification zone: Report

A Russian surveillance aircraft was spotted twice over a two-day period within the Alaska air defense identification zone, according to NORAD.

Haley Chi-Sing is a Fox News Digital production assistant. You can reach her at @haleychising on Twitter.

An air defense identification zone is a self-declared airspace zone surrounding a country or a territory. The country is allowed to identify any foreign military aircraft that passes through the airspace. "The ready identification, location, and control of all aircraft" are necessary for all aircraft entering the ADIZ due to national security purposes, according to the Federal Aviation Administration. 

Foreign aircraft are legally allowed to fly through the airspace. Although, doing so could be seen as an act of aggression as the aircraft could cross into sovereign airspace.