At a clinic in Sudan's North Darfur, where dozens of bony children lie on cots and men with bandaged wounds await surgery, patients described a desperate escape from the city of al-Fashir as it was captured last week by a paramilitary force.They are among up to 10,000 people who arrived in the town of Tawila after fleeing the capture of nearby al-Fashir by the Rapid Support Forces, and are now being treated at the clinic run by international aid agency Medecins Sans Frontieres.Famine-stricken