From her time as an executive at McDonald's to her 18 years in the airport industry, Zenola Campbell has spent a career in hospitality. She's learned that if you focus on satisfying customer needs, everything else will fall in place. As Dallas-Fort Worth International Airport prepares to celebrate its 50th anniversary, the airport and its concessions program continue to evolve in that direction, finding new ways to reduce traveler stress by automating processes and keeping them entertained.