A handout photograph taken and released on July 12, 2019, by the Turkish Defence Ministry shows a Russian military cargo plane, carrying S-400 missile defence system from Russia, during its unloading at the Murted military airbase (also known as Akincilar millitary airbase), in Ankara. - The delivery to an air base in Ankara comes after Washington warned this week that there would be "real and negative" consequences if Turkey bought the defence system. NATO, which counts Turkey as one of its members, has repeatedly warned Turkey that the Russian system is incompatible with other NATO weapons systems, not least the F-35, a new generation multi-role stealth fighter jet. (Photo by TURKISH DEFENCE MINISTERY PRESS / TURKISH DEFENCE MINISTRY / AFP) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / TURKISH DEFENCE MINISTRY"- NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS