President Donald Trump is attending the NATO summit in Ankara after accepting President Recep Tayyip Erdogan's personal invitation, and US officials say the visit could open the way for eased US restrictions on military sales including F-35 engines while the White House readies strategic proposals to influence Ankara.The decision strengthens Turkey's leverage inside NATO: it fields the alliance's second-largest military, controls the Bosporus and has expanded a domestic defence industry that supplies drones and parts to Ukraine, even as Congressional opposition over Turkey's S-400 purchase constrains rapid arms transfers.Tensions over burden sharing have resurfaced at the talks after
Donald Trump asserted "We are the most powerful," delegations endured heat and thunderstorms, and Moscow issued stronger warnings against arming Ukraine as
NATO pushes to boost European weapons production and defence spending.