Dallas/Fort Worth Airport chief executive Jeff Fegan announced on Thursday that he will retire in September.Fegan, 58, has held the top position at the airport for 19 years, overseeing its operations after the terrorist attacks of 9/11 and the construction of a new international terminal, Terminal D in 2005."I felt now is the right time to pass the baton to the next generation of leaders," Fegan said when he announced his retirement at the DFW Airport board meeting Thursday morning. "It's time to move forward."He is also currently directing the airport through its first major renovation of the original terminals built in 1974. The airport is spending $2 billion to update Terminals A, B, C, and E. The first renovated phase of Terminal A is scheduled to open in February.Read more as the story develops.