Guardian: The head of the UN’s World Food Programme (WFP) today called for global action to tackle the "silent tsunami" of the world food crisis. Josette Sheeran, executive director of the WFP, said international action is needed to respond in the same way nations reacted to the boxing day tsunami in 2004. If nothing is done, 100 million people face being plunged into hunger, Sheeran warned. Speaking ahead of a summit on food prices, she said: "This is the new face of …