Bali's International Airport reopened this afternoon after a nearly three-day shutdown as towering columns of volcanic ash and smoke shifted direction on the Indonesian resort island. <br/><br/>The move raised hope for some of more than one lakh twenty thousand tourists stranded after a surge in activity at Mount Agung had grounded hundreds of flights since Monday, sparking travel chaos. <br/><br/>It is not immediately clear when flights would resume. As of today, around 440 flights had been cancelled since the start of the week. Airport officials cautioned that the airport could shut again if winds change direction once more and endanger flights. <br/><br/>Ash is dangerous for planes as it makes runways slippery and can be sucked into their engines. <br/><br/>Tens of thousands have already fled their homes around the volcano — which last erupted in 1963, killing around one thousand six hundred people.<br/>