This week, intelligence agencies are expected to release declassified material on what they have learned about Covid’s origins, a subject of intense interest and scrutiny among American lawmakers.
But people briefed on the material say there is no smoking gun, no body of evidence that sways the intelligence community as a whole, or top C.I.A.
In fact, senior intelligence officials remain more convinced than ever that the agencies are not going to be able to collect a piece of evidence that solves the puzzle.
Local and national authorities in China, U.S. officials say, destroyed some virus samples and used up others in research, all of which might have helped answer the questions over Covid’s origins.
But those officials also caution against overstating the importance of the destroyed samples.
Organizations:
Trump, Biden, Energy Department
Locations:
U.S, China