Turkey's presidential election is going to a runoff after Recep Tayyip Erdogan comfortably defeated his chief rival Kilicdaroglu but failed to clear the 50 per cent vote threshold needed to avoid a second round. Pre-election polls had suggested Erdogan risked a first national election defeat to his main challenger, the unity candidate for a disparate six-party alliance, in a vote seen as the most critical in the Muslim-majority country's recent history. NDTV's Parmeshwar Bawa reports.