In a Tuesday Oct. 16, 2012 photo, farmer and philanthropist Howard Buffett is keynote speaker for Iowa Hunger Summit, hosted by the World Food Prize. Buffett challenged all American far

 

              In a Tuesday Oct. 16, 2012 photo, farmer and philanthropist Howard Buffett is keynote speaker for Iowa Hunger Summit, hosted by the World Food Prize. Buffett challenged all American far
In a Tuesday Oct. 16, 2012 photo, farmer and philanthropist Howard Buffett is keynote speaker for Iowa Hunger Summit, hosted by the World Food Prize. Buffett challenged all American farmers to donate the profits from at least one acre of their harvest to their local food banks in an effort to eradicate hunger nationwide. (AP Photo/The Des Moines Register, Steve Bullock) MAGS OUT, TV OUT, NO SALES, MANDATORY CREDIT**