U.S. Secretary of Energy Ernest Moniz, center left, and San Antonio, Texas, Mayor Julián Castro, center right, take a look at a solar car built by students at San Antonio's James Madison High Schoo

U.S. Secretary of Energy Ernest Moniz, center left, and San Antonio, Texas, Mayor Julián Castro, center right, take a look at a solar car built by students at San Antonio's James Madison High School. During his Feb. 6, 2014, visit, Secretary Moniz also discussed domestic oil and gas production, advanced manufacturing and how the Energy Department could do more with cities to advance clean energy and energy efficiency. ( Photo courtesy of the University of Texas at San Antonio)