By MENELAOS HADJICOSTIS
NICOSIA, Cyprus (AP) — Invading Russian forces are closing in on Ukraine’s capital and the city government is warning of street fighting and urging residents to stay inside and take cover. President Volodymyr Zelenskyy is calling on Ukrainians to “stand firm” in a fight for the future of their country. The Americans offered to help him evacuate, but he refused. U.S. defense officials believe the Russian offensive has encountered considerable resistance and is proceeding slower than Moscow had envisioned, though that could change quickly. Ukraine shot down two Russian transport planes, at least one with paratroopers on board.