ISTANBUL Turkey pointed the finger at Islamic State on Wednesday for a triple suicide bombing and gun attack that killed 41 people at Istanbul's main airport, and President Tayyip Erdogan called it a turning point in the global fight against terrorism. In the deadliest of a ****** of suicide bombings this year in Turkey, the attackers struck the busy airport, a symbol of Istanbul's role as the Muslim world's most open and cosmopolitan city, a crossroads between Europe and Asia. Three bombers opened fire to create panic outside the airport on Tuesday night, before two of them got inside and blew themselves up.