 Complete the following phrase:  In foreign affairs, Ivan Kostov followed a strongly pro-EU and pro-NATO course, putting the country on a firm path of integration with the EU and NATO. As a part of the pro-NATO stance of his government, during the war in Kosovo he showed leadership by allowing NATO but not Russia to use Bulgarias airspace despite overwhelming opposition in Bulgaria to the NATO air campaign against Yugoslavia and daily protest marches led by the Bulgarian Socialist Party. This single act prevented Russia from resupplying 