Billy Shore, founder of nonprofit Share Our Strength, decided years ago that child hunger in the U.S. was “a solvable issue” and launched the ‘No Kid Hungry’ program. And success was easier to attain than he thought: The nonprofit discovered that there was federal funding for school meals that wasn’t being tapped by states and cities. By alerting and helping school districts to access those funds, the organization was able to nourish another  3.2 million kids. Shore shared his strategies with Wharton management professor Katherine Klein , who is also vice dean of the Wharton Social Impact Initiative . Below is an edited transcript of the discussion. Katherine Klein:  What is the problem of hunger in the U.S.? What is the problem with food insecurity? What’s hunger? What’s food insecurity? Billy Shore:  Hunger and food insecurity are actually different. Hunger in the U.S.…