plans for humanitarian corridors — to allow civilians to leave mariupol in the south of ukraine — have failed to come off. 200,000 people are desperate to escape the city — to safety. 0ur eastern europe correspondent sarah rainsford has been to the town of zaporizhia — whose nuclear power plant was targeted by russian troops earlier this week — and which is ready to receive evacuees. zaporizhzhia was ready for crowds of people today, bus—loads of families, fleeing the fighting further south. this is the nearest safe city, just outside the conflict zone. wladyslaw remembers trips to the state circus as a schoolchild. he never imagined turning the ring into this, a refuge, in a war. but the thousands he was expecting to help didn't show up. there was no ceasefire, the safe corridor to allow people to reach here was never set up. translation: we were waiting