tonight, evia is still burning and the flames are spreading towards one of the island's largest towns. bethany bell, bbc news, athens. the afghan government says american b52 bombers have killed more than 200 taliban fighters in a series of air strikes in the city of sheberghan, where the insurgents claim to have taken control. shebhergan is the stronghold of former afghan vice—president abdul rashid dostum, whose supporters fight against the taliban. it comes after the militants said they'd captured zaranj in nimroz, close to the border with iran, in a major escalation of their offensive. they've made sweeping gains since foreign forces started withdrawing from the country. the us and the uk have asked their citizens in afghanistan to leave the country immediately because of the worsening security situation. richard galpin reports. in this fast—moving offensive the taliban are claiming a second province