FILE – A Jet Blue jetliner taxis down a runway as a Southwest Airlines airliner takes off from Denver International Airport Tuesday, July 5, 2022, in Denver. Shares of JetBlue are rising more than 15% before the market open on Tuesday, Feb. 13, 2024, as activist investor Carl Icahn took an almost 10% stake in the airline. (AP Photo/David Zalubowski, File)