were reportedly requesting upgrades prior to the covid-19 outbreak. some house republicans say the information lends new credence to the lab leak theory. rich edson has details. >> months before the covid-19 pandemic spread across the world, the wuhan national biosafety lab requested bids from major renovations to air safety, waste treatment systems. those research facilities have been operational for less than two years. >> all of these roads point to the lab being the source. >> it's unclear why the chinese government requested the projects or when or if they even initiated any work. though it is another piece of circumstantial evidence from the republican staff on the house foreign affairs committee which lays out the most comprehensive case yet arguing that the pandemic began in the wuhan institute of urology. virology.