NEW DELHI – India’s recent decision not to purchase American warplanes for its $10 billion-plus fighter aircraft program – the largest single military tender in the country’s history – has stirred debate in defense circles worldwide. India’s defense ministry deemed the two American contenders, Boeing’s F/A-18 Superhornet and Lockheed’s F-16 Superviper, not to fulfill the requirements that it sought in a medium-size multi-role combat aircraft.