<p>The North American Aerospace Defense Command (NORAD) on Tuesday said it detected four Russian military aircraft operating in the Alaska Air Defense Identification Zone (ADIZ).</p><p>The Russian aircraft remained in international airspace and did not enter American or Canadian sovereign airspace, NORAD said.</p>
<p>The North American Aerospace Defense Command (NORAD) on Tuesday said it detected four Russian military aircraft operating in the Alaska Air Defense Identification Zone (ADIZ).</p><p>The Russian aircraft remained in international airspace and did not enter American or Canadian sovereign airspace, NORAD said.</p>