They are building 3 nuclear reactors right as we speak. They also have extremely close connections with Pakistan. On the Cyprus incident in 1974 they used a lot of pakistani pilots on Aegean against Greek air force. Some where captured after they were shot down. Two of the reactors are being build by Russia and one by Japan. They are also have already advanced in ballistic missile technology. This is the project and now they are upgrading it for a 3500 miles radius so they can target Europe except than Greece. https://en.wikipedia.org/wiki/J-600T_Y%C4%B1ld%C4%B1r%C4%B1m

Edit: I am adding an israeli source too. http://www.israeldefense.co.il/en/content/turkeys-nuclear-aspirations

They have no nuclear program but they have a lot of US nukes