President Trump will return to the world's biggest stage this week to address heads of state at a time when U.S. global leadership is seen as waning.

When he takes the stage at the United Nations General Assembly for the third time on Tuesday, Trump is expected to "affirm America's leadership role" and "underscore that America is a positive alternative to authoritarianism," said a senior administration official.

Ahead of a week when President Trump will have his first face-to-face meeting with the Ukrainian president, Democratic calls for investigation of Trump's communications with Ukraine have intensified.

Nearly the moment Republican Sen. Johnny Isakson announced his plans to resign late last month, rumors and speculation started flying about whom Georgia Gov. Brian Kemp would appoint to fill the seat.

Isakson plans to leave the office he has held for nearly 15 years at the end of 2019 for health reasons.

It's back-to-school time on both sides of the U.S.-Mexico border, and in the border town of Matamoros, Mexico, migrant children are attending a different kind of classroom.

Volunteers have created a pop-up school on a downtown sidewalk in hopes of giving the kids some sense of stability.

"One, two, three, four ..." Tito, an asylum-seeker from Cuba, counts in Spanish in front of a group of children attending the sidewalk school recently.

He fled his native Cuba because he feared being persecuted for being gay, and he asked that we not use his last name.

Charlie Winter, a London-based terrorism researcher, was dining with friends one recent evening when the conversation turned to whether it is ethical to eat meat.

Someone brought up slaughterhouse conditions, Winter said, and he instantly grew uneasy. He stayed for a while longer, squirming, and then finally left the room. That word — "slaughterhouse" — had conjured images of one of the most gruesome ISIS videos he'd come across. The militants had filmed a mass execution in a slaughterhouse, casting their prisoners as the animals.

You have $1, and you're thinking about investing it in the stock market. All you know about the company you're going to invest in is that it's a tech company with more women on its workforce than the average tech firm.

How much of your dollar do you invest?