![ANKARA, TURKEY - NOVEMBER 25: The S-400 air defence system from Russia is activated for testing at Turkish Air Force's Murdet Air Base on November 25, 2019 in Ankara, Turkey. Turkey purchased the anti-aircraft weapons system from Russia over the objections of the United States, which has threatened to sanction Turkey and exclude it from its F-35 fighter jet program. The U.S. fears that the F-35, which is designed to evade such anti-aircraft systems, will be compromised if Turkey deploys both. (Photo by Getty Images)](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/SN6DBJYGLWXEEW3QCHWRMTVPKY.jpg?smart=true&auth=d9d7374672dd0bfc18ed99ca9648c07c626691f91129dccbf39f449f2b83a750&width=400&height=225)
The S-400 air defence system from Russia is activated for testing at Turkish Air Force's Murdet Air Base in Ankara, Turkey. Getty Images
The S-400 air defence system from Russia is activated for testing at Turkish Air Force's Murdet Air Base in Ankara, Turkey. Getty Images
Turkey tests S-400 Russian missile system with US jets, defying Washington
Footage shows jets flying over Ankara to test new system, despite US and Nato opposition to deal
Joyce Karam
26 November, 2019