Some Virginia middle schoolers are learning the valuable lesson of healthy and successful conflict resolution.Preview: Amazon, Google, Microsoft and OpenAI are just some of the many companies taking part in the first-ever AI Expo for National Competitiveness in Washington, DC. Schools, government offices and contractors are also getting a gander at the latest offerings featuring the emerging technology and hope to wrangle some partnerships out of their attendance. The expo's mission is to showcase AI breakthroughs and discuss how they can help the U.S. and its allies remain competitive with the rest of the globe. The event takes place today and tomorrow.