Red Line(Linha Vermelha)

In 1975, Thomas Harlan's crew filmed Torre Bela's homestead occupation, in the center of Portugal. Three decades later, RED LINE revisits this emblematic film of the Portuguese revolutionary period: in which way did Harlan interfered in the events that seems to naturally develop in front of the camera? What was the impact of the film on the lives of the occupants and the memory of that period?