Kathy Van Sluyters (left), Barbara Carr and Colleen Dickinson chat on a recently finished sidewalk across from Wildflower Terrace, a mixed-income apartment building in the Mueller development for people ages 55 and over. Julia Robinson for NPR hide caption

itoggle caption Julia Robinson for NPR

Solar Sunflowers, an art installation, greets visitors to Mueller's commercial and retail hub off of Interstate 35. The panels power a nightly light display and return power to the grid. When the development is complete, five miles of granite trails will connect the residents to its commercial and retail hubs. Julia Robinson for NPR hide caption

itoggle caption Julia Robinson for NPR

Traffic moves along Route 21 in downtown Newark, N.J., where a gas station lists the price for regular unleaded gasoline at $1.72. Julio Cortez/AP hide caption

itoggle caption Julio Cortez/AP

Police tape marks off the scene after authorities apparently shot and killed a man who they say opened fire on the Mexican Consulate, police headquarters and other downtown buildings early Friday. Jim Vertuno/AP hide caption

itoggle caption Jim Vertuno/AP

Bystanders rush to help those who were struck by a vehicle early Thursday on Red River Street in Austin, which was crowded with people headed to South by Southwest events. Jay Janner/Austin American-Statesman/MCT/Landov hide caption

itoggle caption Jay Janner/Austin American-Statesman/MCT/Landov

Bystanders rushed to help those who were struck by a vehicle early Thursday on Red River Street in Austin, which was crowded with people headed to South by Southwest events. Jay Janner/Austin American-Statesman/MCT/Landov hide caption

itoggle caption Jay Janner/Austin American-Statesman/MCT/Landov

Matthew Marcus works at his desk in the basement of Kansas City Startup Village in Kansas City, Kan., in January. The village houses several startup companies and takes advantage of the high-speed Internet. Google announced on Tuesday it would be installing its Google Fiber network in Austin, Texas, next. Orlin Wagner/AP hide caption

itoggle caption Orlin Wagner/AP

Ferrari's Fernando Alonso during qualifying at the Circuit of the Americas in Austin, Texas. Paul Gilham/Getty Images hide caption

itoggle caption Paul Gilham/Getty Images