A highly anticipated ceremony for the delivery of Turkey’s first two F-35 fighter jets from the United States will take place at the defense contractor Lockheed Martin’s headquarters in Fort Worth, Texas on June 21, despite successive attempts by the U.S. Congress to block the supply of the new generation fighters to its NATO ally.

In a previously unannounced emergency meeting on Saturday morning, the Government Council for Foreign Affairs and Defense (KYSEA) decided to upgrade 85 F-16s to the Viper standard.

The Defense Security Cooperation Agency (DSCA) released details on the deal for the upgrading of Greece’s F-16 fighter jet fleet following the meeting between Greek PM Alexis Tsipras and US President Donald Trump in Washington.