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 signs that Egypt is looking at buying Russian weapons after a slowdown in U.S. military aid. […]