In the UK 1st September means back to school. No doubt some parents are frantically making sure their children are fully equipped for the new school year, while many girls and boys are wishing the summer holidays would never end. But in Kenya, when children return to the classroom, some faces will almost certainly be missing - the faces of girls. Girls who are absent not by choice. Not because they don't want to study. But because during the holidays they have undergone female genital mutilation (FGM).