Following his participation in the Ukraine Peace Summit in Switzerland last weekend, Sikorski sat down for a wide-ranging interview with Radio Poland's Danuta Isler to discuss the situation in Ukraine.
He also commented on preparations for July's NATO summit in Washington and the future of Polish-US relations if there is a change of president in America after the presidential elections in the fall.
"Poland is and will continue being one of the staunchest advocates of Ukraine on the international arena because it is in our interest for the lessons from two bloody world wars to be maintained: namely that you may not change borders in Europe by force," Sikorski said.
Click on the audio player above to listen.