While food prices surge and the world faces a hunger crisis, top U.S. grain giants have reportedly reached record profits, raising concerns of profiteering and speculation. What's the situation? And what role is the U.S. playing to end the crisis? (12:18) China has condemned U.S. cyber attacks on China's Northwestern Polytechnic University after an investigation proved an NSA breach. What is the U.S. National Security Agency? How does it work? How can cyber security be improved?