A line of heavily armed soldiers guarded a presidential palace. Opposite them, walking silently in a circle, wearing their trademark white headscarves, was a group of mainly middle-aged women, and prominent among them was Hebe de Bonafini.
In the late 1970s and early 80s, Argentina suffered under a military dictatorship that kidnapped, tortured and murdered several thousand of its own citizens. Anyone who protested was likely to find themselves a victim of the repressive regime.