here to discuss is wall street journal immigration reporter michelle hackman. ank you so much for joining us. let's remind everybody first, how does title 42 work and how does this app fit in with the title 42 pross? michelle: so title 42 is a policy that because of public health reasons, allows the government to sort of, they call it expelling migrants back to mexico or their home countries on the risk that they might spread covid. but the really key point here is that it prevents migrants, the asylum seekers from even asking for asylum. under normal circumstaes, if you ask for asylum, they cannot kick you out of the country. i mean, that's how asylum law works. ali: and then this new system that is replacing title 42, how does it work? and then how does this app fit into that? michelle: yeah, so this app, it is called cbp one. it's actually been introduced already even while title 42 is still in place. and the way it works is that if you're an asylum seeker, you essentially can't ask for asylum if you cross the border illegally, which is the way that mosteople