letter, all the scientists signed on the letter saying any consideration, that this was manmade or could have come from the wuhan lab was just a conspiracy theory. what changed over that three-day period and why wasn't dr. fauci transparent with the trump administration and the public about the fact that this could have, in fact, been manmade in that lab in wuhan? >> at least one of the doctors did not sign that view of the wuhan virus. came from a larks part of the research, to publishing an article in nature magazine kind of discounting the lab-made theory. as you said, calling it a conspiracicy. one highly respected scientist would not sign it. you actually published in part an email from former nih