They're asking him about nuclear weapons, boss of NATO answers: Google Search

Chief NATO, Jens Stoltenberg, has refused to respond to the controversial programme in which states that do not develop nuclear weapons have been trained by American nuclear weapons-making companies.

Speaking to a group of students at Dallas's Methodius University, Stoltenberg refused to respond.

I don't have comments about which countries are part of the program, you can Google this and you can choose if you trust information in Wikipedia or not”, Stoltenberg said, writes Periscope.

The United States, they have weapons but are also NATO allies. Thus, different nations cooperate in various ways on nuclear capacity”, he said. /Periscopi/