It’s been over three years since the Trump administration began separating families at the US-Mexico border. Officials said the so-called zero tolerance policies would deter migration. Critics saw what happened as a national shame. In all, more than 5,500 children were separated from their parents. Many have been reunited, but hundreds remain apart. This week, President Joe Biden announced a task force to reunite families. But some people have already been doing this work — scouring the mountainsides of Central America, searching for parents. KQED reporter Michelle Wiley reports on these efforts.