We begin in central Iran, where 66 passengers and crew members have been killed in a plane crash. The aircraft was a twin-engine turboprop ATR-72 belonging to Iran Aseman Airlines. It took off from the capital, Tehran early on Sunday morning, but disappeared from radar 50 minutes later. It crashed in a mountainous area near the town of Semirom, 185 kilometers from its destination, Yasuj. Twenty emergency teams have reportedly been dispatched to the site of the crash.