A woman holds her malnourished boy outside her hut in a slum area in Raida town, some 60km (37 miles) northwest of the Yemeni capital Sanaa February 13, 2012. Political turmoil has pushed Yemen, already one of the poorest countries in the Arab world, to the brink of a humanitarian crisis to rival the one that ravaged the Horn of Africa last year.The United Nations Children’s Fund, UNICEF, says 57 percent of Yemen’s 12 million children are chronically malnourished — the highest level of chronic malnutrition in the world after Afghanistan. -REUTERS