Thousands of high school students are tuning up their robots for the U.S. First Robotics Competition this weekend. We'll talk with three students at a regional competition. Eszter Offertaler is from Silver Spring, Maryland. Her team left the computer with the "robot brains" at home and had to improvise. Kelly Zelaya, a senior, leads a rookie team from rural North Carolina. And Nalishia Fairley represents her team, Greensboro's Technical Assassins.