Members of South Africa's labour federation Cosatu march against soaring food prices in Johannesburg April 17, 2008. Rice prices on world markets have climbed about 75 percent in just two months, and the cost of wheat has rocketed by 120 percent in the past year. The price of maize, an African staple, has more than doubled since the beginning of 2006. REUTERS/Siphiwe Sibeko (SOUTH AFRICA)
REUTERS/SIPHIWE SIBEKO