Watch | Iran celebrates festival of twins

Large numbers of Iranian twins gathered in Tehran on Thursday to celebrate the country's national Festival ofTwins.People were doing double-takes everywhere as identical twins, dressed identically, cheered and clapped.They applauded a band consisting two sets of identical twins.The hall where the event was staged had seating for 12,000 people, and it was almost full, although the number of twins attending wasn't clear.This was the sixth national Festival of Twins, and organisers had been hoping to break the Guiness World Record for the largest gathering of its kind - but there was no accurate count