Agence France Presse: Soaring food prices are causing logistical headaches for aid agencies committed to fighting hunger, not least the World Food Programme — known to many as the granary of the United Nations. “We distribute four million tonnes of supplies each year, so the 55 percent rise in food prices since June 2007 has an enormous impact on our operations,” WFP spokeswoman Christiane Berthiaume told AFP. Two million tonnes are bought by the WFP in regional markets while the rest is …