stepping up to help transport afghans and foreign nationals outside. we will take you inside one of those rescue missions. also, this. >> they have so much data now. we have so much experience with these vaccines. it is unusual for an application. with this much experience. >> john: after hundreds of millions of doses of the vaccine being administered, the fda has now given a full approval to pfizer. could this be a major game changer, encouraging more people to get their vaccine? dr. marty makary is on standby, and he will join us, coming up next. for what you need. oh, yeah. that's the spot. only pay for what you need. ♪ liberty, liberty, liberty, liberty ♪ i brought in ensure max protein, with thirty grams of protein. those who tried me felt more energy in just two weeks! [sighs wearily] here, i'll take that! woo-hoo! ensure max protein.