Poland and the NATO alliance have discussed potential protective measures after a violation of Polish airspace by an apparent Russian cruise missile, the Foreign Ministry in Warsaw said on Monday evening. Polish Foreign Minister Radoslaw Sikorski spoke with NATO Secretary General Jens Stoltenberg about the possibility of reinforcing the security of Polish and NATO alliance airspace, the ministry. Sikorski notified the NATO chief of the details of the Sunday incident as well as the proceedings launched afterwards. According to the Polish military general staff, a Russian missile entered Polish …