Fresh Air Weekend highlights some of the best interviews and reviews from past weeks, and new program elements specially paced for weekends. Our weekend show emphasizes interviews with writers, filmmakers, actors and musicians, and often includes excerpts from live in-studio concerts. This week:

The CIA has concluded that Saudi Crown Prince Mohammed bin Salman ordered the killing of outspoken Saudi journalist Jamal Khashoggi, according to media reports.

A new report says Oklahoma prison admissions are rising despite efforts to slow the state's incarceration rate, which is the highest in the U.S.

The Tulsa World reports that prison reform advocates Oklahomans for Criminal Justice Reform and FWD.us released the study Friday.

The report says Department of Corrections admissions increased by 11 percent in the first year since State Question 780 took effect. Voters approved downgrading offenses including simple drug possession from felonies to misdemeanors.

For nearly a month, the two sisters — then ages 17 and 12 — traveled by road from their home in El Salvador to the southern border of the United States. They had no parent or relatives with them on that difficult journey in the fall of 2016 — just a group of strangers and their smugglers.

Ericka and her younger sister Angeles started out in multiple cars, Ericka remembers. "In Mexico, it was buses. And we changed buses very often." (NPR is using only the sisters' middle names to protect their identity as they await a decision on their application for asylum in the U.S.)

Working in Bolivia's mines is a family business.

That's what Italian photographer Simone Francescangeli saw when he traveled to the city of Potosí of about 250,000 to document the daily lives of miners. They're part of a centuries-old enterprise to extract silver, tin, zinc and gold from the mountains. He was struck by the harsh and sometimes dangerous conditions the miners work in — and by the number of children he saw working in the mines. Some were teenagers. One youngster said he was 11 years old.

This week in the Russia investigations: President Trump says he, and not his lawyers, completed written questions for the special counsel. Now, the ball is back in Robert Mueller's court.

Paper jam

President Trump says he has finished his open-book, take-home exam.

It used to be you'd sign on the bottom line, whether it was a check, or a credit card receipt, or even a love letter. But the art of the signature has become less important and less practiced, and that has meant less certainty for elections officials in several states who are still counting votes from the Nov. 6 midterm elections.

Those officials are trying verify that the signatures required on mail-in, provisional, absentee and military ballots match the signature that voters have on file with the board of elections.