of how the universe works. carol? >> cool. john zarrella live in florida. thanks so much. cnn is your coverage set for 3:30 p.m. eastern this afternoon. and on cnn, chief medical correspondent, sanjay gupta, meets the doctors credited for saving the life of gabrielle giffords. that's sunday night, may 8th, at 7:00 eastern. millions of people watched william and kate say there i dos. how did she keep that hat on her head, i'm wondering. >> carol, so many hats, so little time. we need to talk about why hats and who wore what and what was in and what was out. that's next here on cnn. [ cellphone vibrates ]