Long before he was president, Lyndon Johnson taught in Cotulla, Texas. He is pictured here with students in 1928. Courtesy of LBJ Library hide caption

itoggle caption Courtesy of LBJ Library

This nighttime NASA satellite image from 2012 shows lights from drilling sites and natural gas flaring along the Eagle Ford Shale. NASA hide caption

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Bob Butler (left) and Bob Gordon work on a memorial Thursday at Central Christian Church in Killeen, Texas, for the victims of the Fort Hood shooting. Eric Gay/AP hide caption

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Students participate in orchestra practice at Dr. John Folks Middle School in suburban San Antonio. The school is brand new and was built with explosive growth in mind — the student population is expected to double to 1,200 within five years. Melissa Block/NPR hide caption

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Soldiers participate in physical therapy while using a prosthetic brace called the Intrepid Dynamic Exoskeletal Orthosis (IDEO), which allows them to use and strengthen severely injured legs. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images