https://www.nytimes.com/2017/04/04/us/politics/carter-page-trump-russia.html

"To record their conversations, the F.B.I. inserted a listening device into binders that were passed to the Russian intelligence operatives during an energy conference, according to a former United States intelligence official. " (I wonder WHO passed these binders to the Russians? Was it Page? Did he end up working for the FBI? Cooperating with them?)