Airports in Europe continue to reopen, with many scheduled flights now set to go ahead, as the impact of Iceland's volcano starts to lessen. Millions of travellers have been given fresh hope, after six days of uncertainty following the closure of airspace over the continent. However authorities insist no-fly zones would remain where the ash cloud density is unsafe. More than 95,000 flights were cancelled in the last week. Airports across Europe were closed over fears that volcanic ash from Iceland could affect airliners' engines. Artur Saltikovsky, leading scientist from the Institute of Earth's Physics, says the volcanic ash no longer poses a hazard to planes.