Earlier this week, the chief military officers from Russian Federation, the U.S. and Turkey met in the Turkish city of Antalya, in an apparent attempt to work out additional steps to prevent incidents.
Russian Federation and Turkey now jointly support a Kazakhstan-based series of negotiations to end the fighting in Syria, and have begun coordinating military operations there in some cases.
The pipeline will also increase Russia's leverage over Turkey which has nearly no gas storage facilities of its own and is entirely dependent on Russian Federation to deliver gas in exactly the amounts its requests from Moscow to run its economy. "We have stated that due to the active role of Russian Federation and Turkey, we managed not only to reach a ceasefire between Syrian troops and the armed opposition, but also to start direct talks between the fighting parties in the capital of Kazakhstan, Astana". The government forces and armed opposition groups, which have over 60,000 members, have joined the truce.
At a joint press conference following a meeting of the Russian-Turkish Cooperation Council, Putin said "the ceasefire in Syria is generally holding thanks to the well-coordinated efforts of Russia, Turkey and Iran".
Turkey sent troops across the border into Syria in August, backing Free Syrian Army rebels in battles against Islamic State. Erdogan echoed the comments, saying that maintaining Syria's current borders was Turkey's "main goal".
Turkey has been looking to buy a long-range missile defence system since 2013 and Turkish media reported in November that Moscow had submitted an initial offer. The Russian president said he was very pleased that interstate relations between the two countries are restoring rather quickly.
Erdogan said he expects Russian Federation to lift completely economic restrictions previously imposed on Turkey.
Erdogan's apologies for downing the plane helped rebuild ties, and Putin offered firm support to the Turkish leader in the wake of a failed coup attempt last July.
Putin not only mentioned Turkish citizens' visits to Russia but also Russians traveling to Turkey, which has been dubbed "Russia's health resort" because of the large number of Russians who visit that country's Black Sea resorts.
Erdogan also called the meetings in Astana, Kazakhstan where the Syrian ceasefire was agreed earlier this year "an additional factor, making the process launched in Geneva more effective".
Turkey plans to make its first nuclear power plant, Akkuyu, operational in 2023, Turkey's Energy and Natural Resources Minister Berat Albayrak said on February 3. Both projects were suspended amid the escalated tensions at the end of 2015.
Erdogan also voiced interest in developing cooperation in defense industries.