In the India-US trade deal standoff, at the heart of the negotiations are tariff reductions and reciprocal market access. The U.S. wants access to India's food and fuel markets, from genetically modified corn and ethanol, to soyabean and even dairy. But why is India pushing back hard? NDTV's Parmeshwar Bawa breaks down the political, economic and cultural firestorm behind the trade deal negotiations.