One of the most important sources of talent for U.S. cities is foreign students enrolled in our universities. That's why Neil Ruiz is taking a closer look at where they come from and the impact they are having. Neil is a senior policy analyst and associate fellow at The Brookings Institution Metropolitan Policy Program. His research focuses on regional and state economic development, innovation, international migration, high-skilled immigration, as well as global economic issues. Find out how your city can increase its talent by tapping foreign students on this week's 'Knight Cities,' when I talk to Neil Ruiz. You can follow us on Twitter at #knightcities or @knightfdn. And if you have ideas for people you'd like to hear more from, please email me: Coletta (at) knightfoundation.org.