it will feature testimony from three gop witnesses who all said that the virus may have accidentally escaped from a lab. here is what dr. fauci said to anderson cooper about the potential theories. >> they are talking about information that they have that we don't have privy to. so we don't really know. but i don't think that there is a really correct and verifiable answer to your question. it is just still unknown at this particular point. there are two theories as we're all familiar with now, one is a lab leak theory, the other is that it was a natural occurrence from an animal spillover. the one thing that we have to keep an open mind about this up there is definitive evidence. >> the lab leak theory recently gained a boost when the department of energy and the fbi director christopher wray revealed they believe the virus most likely escaped from a chinese lab. but finding the truth is difficult because chinese authorities are not cooperating.