War and chickpeas

From CQ Politics: Like Hansel and Gretel hoping to follow their bread crumbs out of the forest, the FBI sifted through customer data collected by San Francisco-area grocery stores in 2005 and 2006, hoping that sales records of Middle Eastern food would lead to Iranian terrorists. The idea was that a spike in, say, falafel sales, combined with other data, would lead to Iranian secret agents in the south San Francisco-San Jose area.