Massacre in El Salvador examines the horrors of what happened when U.S.-trained and -equipped Salvadoran soldiers killed some 1,000 civilians, many of them children.

FRONTLINE, Retro Report and ProPublica’s investigation follows the ongoing fight for justice for the horrific 1981 attack on the village of El Mozote and surrounding areas, and how today the case against high-ranking military officials is faltering under Salvadoran President Nayib Bukele.

Also airing in FRONTLINE’s two-part Nov. 9 hour: Pandora Papers, an examination of secret finance overseas and in the U.S., in collaboration with the International Consortium of Investigative Journalists.