Are choirs really dangerous in the age of COVID-19? A new study measures the actual number of particles sprayed while singing the classic song "Happy Birthday." Jonathan Reid, a chemistry professor leading the research at Bristol University, speaks to host Marco Werman about the study.

The Booker Prize-nominated novelist was arrested at a political demonstration last week against Zimbabwean President Emmerson Mnangagwa's government.

Ding Jiaxi had been on a collision course with the Chinese government perhaps ever since 1989 when he was a college junior in Beijing.

Ameneh Sharifi was only a few hours old when gunmen stormed the clinic where she was born in May. Her mother died in the attack, but she survived. A doctor and his team worked hard to save her leg. Now the long road to recovery — and justice — begins.

Cuba stands out as a success story as it battles COVID-19. At the same time, it has seen renewed public attention around police brutality. Despite top-down efforts to silence dissent, activists say they are making some headway.

President Donald Trump announced the expansion of a program to send federal agents to several US cities to crack down on violent crime. The World spoke to Quinton Lucas, the mayor of Kansas City, Missouri, about the arrival of some 200 agents in his city this month.

The Gülenists, dubbed by Turkey as FETO, the Fethullahist Terror Organization, are being purged on a massive scale. Those who have been accused include scientists, schoolteachers, policemen and journalists.

A report issued on July 14 by Mexico’s National Search Commission said 73,218 people have been confirmed missing since 1964, and almost all of them — 71,678 — since 2006 when organized crime and drug-trafficking violence in the country began to increase.

ISIS no longer holds territory but the crimes it committed are fresh in the minds of survivors and families of victims. Collecting, preserving and documenting the terror group’s crimes has been slow but ongoing. Now, progress is even harder given the pandemic.

Last year, 13-year-old Christopher Kapessa, who was Black, drowned when a schoolmate allegedly pushed him into a river. Now, the global Black Lives Matter movement has given the family new hope the suspect will be prosecuted.