On Mar. 22, Southwest flight SWA6013 had departed Las Vegas (LAS) for Columbus, OH (CMH) but made a return to LAS due to one of the flights pilots becoming ill. There happened to be another airline pilot on board who does not work for Southwest that stepped in to run the radios for the remaining pilot up front. The company name was not released for the assisting pilot, and no word has been announced on the ill pilots condition or sickness. The FAA is investigating.