covid-19 test within one day of travel. nonu.s. citizens must also show proof of vaccination. cnn, nadia, why isn't the u.s. requiring domestic travelers to test if it's this big of a concern item? >> yeah, that is something many biden administration officials were asked today, trying to figure out limiting the spread of covid-19 and preventing this winter surge. we've known that the omicron variant is already in the u.s. 17 states and kocounting are already saying they have cases of this new variant, so it's already here. why not test or have screening or a requirements for domestic travelers? right now, we only have this new travel policy that will begin tomorrow for international travelers. so if you're trying to get into the u.s. from a different country, you have to show a negative covid-19 test that you took the day before you travelled. you also have to be fully vaccinated, something that started just last month, but