Over 200 Ukrainian specialists are in the Persian Gulf right now, training forces of US allies on how to take down Iranian killer drones.  Ever since Russia invaded Ukraine in 2014, Riyadh and its neighbors hedged carefully between Washington, Beijing and Moscow. Last month, Saudi Arabia signed a 10-year strategic defense agreement with Ukraine. So did Qatar. So did the United Arab Emirates. The countries that bought American for decades are now buying Ukrainian, too. The Saudis figured it out