on the street, right? >> 24 hours is all it's gonna take? >> yep. >> reporter: in the beginning there won't be a choice of which vaccine. whichever is approved first goes out first. >> if pfizer is first, i'll call pfizer, and they'll begin distributing vaccines. it will go to 64 jurisdictions simultaneously, 50 states, 8 territories and 6 metropolitan cities. >> that was really encouraging to hear today and, tom, getting new information about the time line for these first vaccines? >> reporter: david, there is new reporting we have on this. the secretary of health and human services tells our bob woodward the first 40 million doses will be from pfizer and moderna and calls it prompting and points out it's being made in the u.s. so once it's approved it will be ready. david. >> all right, tom. thanks. our thanks to tom llamas and bob woodruff reporting. when we come back, the airline revealing it will soon require a coronavirus vaccine to fly.