Nicolas Maduro is locked up in a U.S. federal jail.

Meantime in Venezuela, a crackdown against any would-be critics.

This is really sort of like a warning shot and also a message, frankly, from the authorities in Caracas, that this is not a change in regime.

I'm Marco Wurman.

And I'm Carolyn Beeler, how team Maduro is very much still in control.

Also today, Nigeria has the world's largest unvaccinated population.

A historic effort is now underway to change that.

This campaign is using that opportunity to ensure that no child is left behind.

In Birmingham, England, a labor dispute that's nearly a year old has turned very smelly.

From one side to another, this road is completely full of rubbish.

Why garbage collectors are refusing to go back to work. All that and more today on the world.

This is The World. I'm Carolyn Beeler. And I'm Marco Wurman. Thanks for joining us this Tuesday.

Venezuela's main opposition leader Maria Karina Machado says she will return home to Caracas as quickly as possible.

Speaking with Fox News from an undisclosed location,

Machado praised President Trump for toppling Nicolas Maduro. She also said that her movement is ready to

win in a free election. On the streets of Caracas today, armed militia groups are on patrol.

They're stopping citizens to search their cell phones. Hardline interior minister

Dios Diozado Caballo shared a video of himself flanked by men with guns.

The militiamen there are shouting loyal, always, traitors never. Elizabeth Dickinson is the Latin

America deputy director for the international crisis group.

She's in Bogota, the capital of Colombia, one of Venezuela's neighbors. When I reached her earlier

today, I started by asking whether Venezuela was indeed, as one government spokesperson described it,

...