The Obama administration's initiative to fight food deserts will help, not harm, mom-and-pop stores.Photo: arbyreedGary Nabhan and Kelly Watters are right that it will take a diversity of new and expanded fresh food stores to truly solve the crisis of inadequate access to healthy food in many low-income areas. Small grocery stores, farmers markets, and expanded convenience stores are all part of a comprehensive, sustainable solution to this challenge. But Nabhan and Watters miss the mark significantly when they assert that the $330 million federal Healthy Food Financing Initiative (HFFI) -- backed by the Obama administration and a bipartisan coalition …