The purpose of the FBI's ambush interview of Gen Flynn was broader than simply the Kislyak call. It was to trip him up on the Deep State's entirely fabricated back story of Flynn's 'transformation from hero to traitor'. THREAD
They start asking Flynn about 2013 trip to Moscow. The trip was officially sanctioned by Obama. What's that to do with ambassador call in 2016? /2 
Next thing they do is start asking Flynn about the payments and trip to Moscow in 2015. But all of this has already been investigated, and no charges were brought. FBI know that. And again, this has nothing with ambassador call. They are tripping him up on Russia contacts
Look, here they ask Flynn if he had any other contacts with Kislyak OR OTHER RUSSIANS. Bit of an echo in WSJ article few weeks later by Shane Harris (connected with Comey): 'Mike Flynn Didn’t Report 2014 Interaction With Russian-British National' Lokhova. See what they are doing?
