we re also hearing from the former cdc director, dr. robert redfield, who led the agency under president trump, and he acknowledged in a sirius xm radio interview that the trump administration could have done more, should have done more to build up testing capacity in the united states in the first few months of the pandemic, jake. thank you, amara. let s bring in medical analyst dr. jonathan reiner. so much to respond to and unpack in amara s reporting there. let s start with canada s new vaccine travel mandate. take a listen. by the end of november, if you are 12 or older and want to fly or take the train, you ll have to be fully vaccinated, as will staff. testing will no longer be an option before boarding. jeff zients, the covid response coordinate owas just asked if the u.s. would ever