Defense Minister Vecdi Gönül said on Tuesday, following a meeting of the Defense Industry Implementation Committee (SSİK), that the negotiations over the F-35 procurement tender had not yielded “satisfactory results.” He said, “We will evaluate the order in the next meeting, in light of the progress made in the talks by then.” He said much ground had been covered in the talks in terms of technology sharing, but this was not enough for Turkey to accept the jets. He said the costs of the project had also increased but that the Turkish side had failed to secure the source code and the remote flight codes for the planes for which it will be paying $16 billion. Without the source code, Turkish engineers wouldn't be able to make any changes to the software that operates the jets. The external flight codes are equally important, if not more, as they can be used externally to navigate the jets. Prime Minister Recep Tayyip Erdoğan, Chief of General Staff Gen. Işık Koşaner and Minister Gönül attended Monday's SSİK meeting, which took place at the Undersecretariat for the Defense Industry (SSM) offices.