Moussa, a 13-year-old Malian refugee, waits for his mother as she visits a doctor in the Mbera refugee camp in Mauritania May 23. More than 320,000 people have fled their homes due to conflict in northern Mali. Half of them have settled in refugee camps in neighboring countries, according to the United Nations. Mbera, the largest of such camps, is home to more than 64,000 people. The camp’s remoteness in the Sahara desert makes delivery of humanitarian assistance difficult. (CNS photo/Joe Penney, Reuters) (May 23, 2012)

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