Two suicide bombers open fire before detonating their explosives at Turkey's biggest airport. At least 28 people have been killed and 60 wounded in twin explosions at the main airport in Istanbul, the city's govenor has said. Two attackers opened fire before blowing themselves up at the entrance to Istanbul Ataturk Airport's international terminal, an official said, citing information from the interior ministry. Police fired shots to try to stop the attackers but they detonated their explosives, the official said. A witness told NBC News that he saw a police officer diving to tackle one of the attackers - who...