From New York Times, I'm Michael Bavaro.

This is Adelaide.

Today, for the past three years, the United States has relied on an emergency health

rule to solve its immigration problems at the U.S. Mexico border.

By the end of the week, that rule will expire.

My colleague, Miriam Jordan, has been reporting on what that will mean for those on both sides

of the border.

It's Tuesday, May 9.

Miriam, I wonder if you can walk us through precisely what's happening at the border

on Thursday.

Well, at 11.59 pm, Eastern time, the Biden administration is lifting an emergency health

rule that has been used to prevent hundreds of thousands of migrants, many of them seeking

asylum from entering the United States.

That rule is called Title 42.

Right, and we've talked about Title 42 a lot on this show, but just explain where Title

42 comes from and what exactly it has done.

Well, Title 42 was imposed three years ago by President Trump under the premise of preventing

the spread of COVID-19 to the American public.

But it was essentially used as a border control tool because, quite simply, it has allowed

U.S. border officials to very quickly turn away most migrants who show up trying to enter

the United States.

No hearing, no chance to ask for asylum, nothing.

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