hello and welcome. the uk looks set to become the latest country to impose covid screening for travellers coming from china as cases in the country surge. the chinese government has said it would fully reopen its borders next week for the first time since march 2020. but a number of countries, including the united states, india, spain, italy and in the last few minutes france have said passengers arriving from china will need will need a negative covid test before they travel. lets speak to our political correspondent helen catt. put this in the picture from a british perspective.- put this in the picture from a british perspective. same story? there s been british perspective. same story? there s been a british perspective. same story? there s been a lot british perspective. same story? there s been a lot of british perspective. same story? there s been a lot of concern - british perspective. same story? i there s been a lot of concern about the reliability of info
more military cooperation. and more than 20 years in the making how a group of retired aviation enthusiasts built a first world war plane from scratch hello and welcome if you re watching in the uk, on pbs in the us or around the world hello and welcome. the uk looks set to become the latest country to impose covid screening for travellers coming from china as cases in the country surge. the chinese government has said it would fully reopen its borders next week for the first time since march 2020. but a number of countries, including the united states, india, spain and italy have said passengers arriving from china will need will need a negative covid test before they travel. our political correspondent helen catt explained why these measures are being taken by the uk as well as by other countries around the world. well, there s been a lot of concern about the reliability of the information that s coming out of china, about the situation there with covid. and that s wh
violence. let s go straight to more, tracking so much of what has done said on line. death threats have been out there, some general like social media posts urging people to kill all feds. but there have also been very specific threats, in particular aimed at the attorney general, merrick garland, and the florida judge who signed and then unsealed that search warrant. how concerned are federal officials about about this going from online threats to actual violence? reporter: yeah. well, sources told our colleague josh campbell that the fbi s investigating an unprecedented number of threats against its personnel including some of its agents. and you can really see that playing out on line since right after the news of that search of mar-a-lago broke on monday. i want to show you some of the kind of messages that have been posted. you mentioned there s one called kill awed feds, another lock and load, another person writes, i m going to say it, garland needs to be assassina
so when they stay far apart from each other last spring in the name of public health, it was an enormous sacrifice whether or not we understood it at the tim. but because this was a trusting and law-abiding country, we obey that order. we barely grumbled about it. we assumed they knew best. 6 feet from each other. that was social distancing. it was the law and most of us follow the law. but where did that law come from? who the of the scientific research that determine 6 feet is that safest distance apart from other people that you could be? someone should have asked that last spring, but as far as we know, no one did ask. it turns out the research that form the basis of that law came from a german high genesis called carl flew. it was he who decided 6-foot separations were necessary for the spread of pathogens. the cdc went with his judgment. with the cdc did not tell us is that carl had been dead 100 years. his research on social distancing was published in the 19th century