US sources: Amid Russia tensions producing F-35 fighter jets without Turkey possible
The United States and other NATO allies who own F-35 fighter jets fear the radar on the Russian S-400 missile system will learn how to spot and track the F-35
Pompeo to announce joint effort with NATO against Russia over Ukraine next week
Pompeo: "Next week I am hopeful I will be able to announce another series of actions that we will jointly take together"
U.S.-Turkey relations headed toward perfect storm
Any country that attempted to buy S-400 systems would face sanctions, but the sanctions to be imposed on Ankara will be much more severe