In Dallas, compressed natural gas (CNG) cabs get to cut in front of regular gas cabs at the Love Field Airport pick-up line. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Omar Sharriff performs in Marshall, Texas in December 2010. Ron Munden/EastTexasTowns.com hide caption

itoggle caption Ron Munden/EastTexasTowns.com

Cornelius Dupree Jr. raises his hand to testify Tuesday while attorney Barry Scheck looks on. Dupree served 30 years in connection with a rape and robbery before being exonerated by DNA evidence. Mike Fuentes/AP hide caption

itoggle caption Mike Fuentes/AP

Lumar C. LeBlanc was photographed for the Surviving Katrina and Rita in Houston project installation, "Who We Are." LeBlanc was interviewed by Dallas McNamara, a fellow Katrina evacuee, on Jan. 21, 2007. Dallas McNamara hide caption

itoggle caption Dallas McNamara