Decision comes as Ankara continues to ignore warnings from NATO ally over procurement of missile defense system

Delivery moves Ankara closer to possible sanctions and new standoff with Washington, which has argued the weapon is incompatible with NATO systems and a threat to its F-35s

Statement comes after Washington threatened to remove Ankara from F-35 fighter jet program and have pilots kicked off training course and expelled from US over purchase from Russia

Report says a dozen attacks were thwarted in Turkey in past 3 years, despite Erdogan's public posturing against Israel, and even when diplomatic ties were severed

Turkish leader gives no timeframe for arrival of missile defense system that is fraying ties with Washington

After Trump insists Palestinians want to negotiate despite boycotting White House, Turkish leader says no way to 'approach this issue positively'

'It's not good,' US president says of S-400 deal during meeting with his Turkish counterpart at G20; Turkey refusing to backtrack despite American threats

Turkish citizen who translated for American drug enforcement agency accused of links to alleged mastermind of failed 2016 coup attempt

Opposition candidate Ekrem Imamoglu wins re-run of mayoral vote in landslide victory seen as blow to Turkish leader Recep Tayyip Erdogan

Turkish president declares purchase of Russian air defense missile system, which has angered Washington, is 'directly related to our sovereignty'