that it has deported almost one hundred central american migrants who tried to cross illegally from tia juana into the united states on sunday it has also called on the u.s. to investigate how u.s. border agents came to fire tear gas across the border when migrants stormed a wall near san diego. or tonight scientists around the world are condemning a chinese doctor who claims to have created the world's first genetically edited babies and he says he altered the d.n.a. of twin girls born earlier this month to try to make them resistant to infections with hiv but his claims have prompted a backlash from the scientific community including the one in china with many casting doubt on these supposed breakthrough and questioning its ethics. the study is not yet been published but academics around the world say quaid has crossed the line the geneticist is said to have changed the d.n.a. of two babies born earlier this month through regular in vitro fertilization. claims the father of the two babies is hiv positive and that he edited the genes while there were just embryos to make them resistant to th

to mexico where the mayor of tia juana has called the plight of state of migrant stranded in his cityn unprecedented humanitarian crisis the child on the u.s. backed scheme border is dealing with an influx of around seven thousand american central americans who are trying to reach the u.s. to apply for asylum they only had a shelter for a third that number leading to squalid conditions for migrants who have trekked thousands of kilometers in search of a new life. the most unique thing about one of us biggest chanter for the so-called caravan migrants is that it provides hardly any shelter at all at least not from the elements not from the rain and not from the cold during freezing nights during the day i am this he commanded by city officials to hold a maximum of just two thousand five hundred people this place now houses more than six thousand migrants and in a few days that number will rise to seven thousand including more than one thousand babies toddlers and young children. we need cindy pinera we talked to her about a week ago she had just arrived with two more for four sisters a

to the increasingly tense situation in the mexican town of tia juana that's on the border to the united states only three thousand migrants have arrived there in recent days thousands more said to be headed to tijuana a part of the migrant caravan that has made its way from central america. with the u.s. busy fortifying its border it's not clear if or when the migrants full be able to proceed all to much for saw all of the city's residents. god what. we don't want to hear that's a message of around two hundred to one our residents purchasing their arrival of thousands of central american migrants the demonstration on the lines growing tension protests is accuse the migrants of forcing their way into mexico and being ungrateful for the help they're offered no get in most capable of yet we turn on our government to support this farce or. when we all know it's a sham. be it in africa that just bringing their problems here program i think. they hear it see you since the government is spending a lot of money on them already also there are many poor people here. the protests much talked at th

mexican border town of tia juana they are among the first migrant caravans to arrive at the border they've traveled a thousand kilometers and they say they want to escape poverty and violence in their home countries they now hope to gain entry into the united states but the u.s. government has sent thousands of troops to the border to stop them defense secretary jim matches has visited troops in texas on the us mexico border u.s. president has threatened to close that border and has labeled the migrants invaders some mexicans living along the border with the u.s. they are showing solidarity with the migrants some but not all some bread a warm meal or even socks migrants are getting help from individuals and institutions like in this makeshift shelter in mexico city to be on a gutierrez is one of those who turned out today she drove a van over loaded with clothes for women and children there must be i would tell you that you when it's gratifying that a lot of people are helping that well it brings out the humanity in us and he pleases me to see the difference we're making. we're all very pr

. >> many migrants are hunkered down in tia juana around what is it about the scrum we saw yesterday? >> we're getting overwhelmed and calling for help for years and the focus -- folks are getting desparate and our agent will response. hopefully lethal response is not needed and tear gas was done for their safety and our safety. >> what would it take to have lethal force? >> serious bodily harm or the threat of death against an agent or somebody nearby. >> the u.s. military backing you up, was it them who used the tear gas or border patrol? >> i'm not certain. we're trained with it so if it was used most likely it was from a border patrol agent or office of the field operations from customs. >> how do you feel about the idea maybe this is the ultimate test but also maybe a chance for the world to see what kind of jobs the men and women who work with you have sovereign rules. >> you don't just let people rush in your house. i don't know what the other train of thought is that this is okay. this is acceptable behavior because it's not. >> let's hope it doesn't get any worse than what we