They've been tied up in Benghazi, shot at by Somalian smugglers, and tracked down the sex slaves of the Taliban. But three of the world's top female documentary photographers – Alixandra Fazzina Kitra Cahana and Lynsey Addario – have seen first-hand that women endure less violence on the frontline ... and can get closer to the action• Kitra Cahana and Lynsey Addario's work is on show as part of the National Geographic's Women of Vision exhibition. A Million Shillings: Escape from Somalia by Alixandra Fazzina is published by Trolley Books