Zeinab Mint Mohamed, 22, poses for a picture in her home in Mbera refugee camp, Mauritania, May 24, 2012. Mint Mohamed, along with her sisters and 2-month old boy Habibi, fled her hometown of Nara, Mali, in March and took two days in Mbera to settle just outside the official camp grounds. Mbera, a refugee camp set up for people fleeing violence in northern Mali, is home to more than 64,000 people, according to the United Nations' refugee agency, UNHCR. While most live in UNHCR-donated tents, hundreds of families living outside the official camp grounds reside in informal structures built by whatever materials they can find, including sticks, blankets, towels and empty cement bags. Picture taken May 24, 2012. REUTERS/Joe Penney