Gunmen of the Gulf Clan, a drug-trafficking militia in Colombia, are seizing tunnels inside one of the largest gold motherlodes in Latin America. The mine belongs to Zijin Mining Group, a Chinese company, which says it has surrendered nearly two-thirds of its tunnels and lost an estimated $200 million worth of gold in 2023. WSJ's Juan Forero reports.

Last year, China’s foreign minister, Qin Gang, suddenly disappeared. Qin was a rising star in Chinese politics and a protegé of China’s strongman leader, Xi Jinping. In the first episode of our three-part investigation, we chart Qin’s rise and begin to untangle the mystery of his disappearance. This series was originally published in October.

Mariah Carey released "All I Want for Christmas Is You" in 1994 to moderate success. Today, the song is a megahit and Christmas playlist staple. What happened? WSJ's John Jurgensen called up the "Queen of Christmas" to find out. This episode was originally published on December 11, 2020.