poland

72-year-old American spent a week feeding refugees in Poland: 'I just knew I had to be there'

Biden says Putin 'cannot remain in power' in off-the-cuff remarks, the Kremlin responds

WATCH: Biden tells Ukraine 'we will help you rebuild'

PHOTOS: Biden has pep talk and Polish pizza party with US troops near Ukraine border

NATO has the 'green light' to send fighter jets to Ukraine, Secretary of State says