Gulf buyers are nearing decisions to buy more current generation fighter jets, but the buzz at the Dubai Airshow was about Lockheed Martin Corp’s radar-evading F-35 fighter – a plane not yet operational and not even on display there.

The U.S. government sent a big delegation to this year’s show, eager to reassure Gulf leaders about their continued commitment to the region despite policy differences over Syria and Iran┬ásigns that Egypt is looking at buying Russian weapons after a slowdown in U.S. military aid. […]