Turkey bought Russian S-400 missiles designed to down NATO planes. For the US, that’s a problem – CNN
But the deal, worth about $2 billion and consummated this week, has consequences far beyond the cost to Ankara's defense budget. It calls into question the decades-long strategic relationship between Turkey and the US, and even Turkey's credentials as a NATO member. It probably nullifies a massive contract for Turkey to buy US F-35 combat [...]