In Argentina, tens of thousands marched through the capital Buenos Aires Sunday, demanding justice and answers in the case of a young activist who went missing two months ago. Twenty-eight-year-old Santiago Maldonado disappeared on August 1 during a protest against the eviction of indigenous people from lands claimed by the Italian clothing company Benetton. Eyewitnesses say Argentine security forces beat and arrested a person around the time of Maldonado’s disappearance. The case has stoked painful memories of the military dictatorship of 1976 to ’83, when U.S.-backed security forces tortured activists and disappeared an estimated 30,000 people.