the president addressing, of course, the virtual covid summit, two things stood out to me. i'm wondering if you have the answers on these. one is how are they going to figure out distribution when it comes to the total of 1.1 billion vaccines, and why such a long wait when it comes to the shipping of these vaccines? the president mentioning this additional 500 million that will be shipped at this time next year. >> well, the administration has said this is an enormous logistic challenge. and they understand that. even before this additional half a billion vaccines were announced, just getting the 160 million they've distributed so far to about 100 countries out the door has been an enormous logistic challenge the administration has been working on behind the scenes for months to try and pull this off. so there is an acknowledgment of that. i know you were talking about a guest earlier about not only just the shipping and movement of all of these vaccines on planes, but then the storage of