Washington is accusing Beijing of unfairly tinkering with the price of corn, wheat, and rice in ways that hurt U.S. exports and farmers. Tuesday, President Obama said his administration filed a complaint with the World Trade Organization and will push hard to give U.S. farmers a fair chance to sell their goods on global markets. As VOA's Jim Randle reports, hundreds of thousands of jobs and billions of dollars are at stake. VOA Khmer's Chhim Sumedh narrates.