U.S. officials are headed to Kenya to resume free trade negotiations and while there they ought to talk about the source of Nairobi’s food insecurity this year – its ban on GMO maize. Sub-Saharan corn and wheat production have been generally outpacing the region’s growing population. Over the past dozen years, population growth has averaged 2.45 percent while corn production has grown by an average 3.28 percent and wheat by 3.99 percent. However, the most recent crops have maize production expanding by .82 percent and wheat declining by 2.6 percent.  Kenya normally imports corn from Tanzania, which is experiencing a shortfall in production. South Africa has surplus exportable corn, but 80 percent of it is GMO, a tech...