of the president's top advisers and to the president himself. once they finished reading intelligence they were told to give it back to the courier so the courier could bring it back to langley. inside the package was information from such an important source that it was almost as if they were seeing directly putin's instructions on what to carry out here. >> let's talk about what i think is really the big headline here. this is an account that there was definitive proof that this was an attempt to interfere in the u.s. election directed by president putin himself. how can you report this so definitively? what gives you and the post so much confidence? >> as we know there was classified annex, classified version of the intelligence report that was made public in early january. this is the document that was provided to the president. it was provided to then-president-elect trump.