Young dancers watch as protestors, reflected in the windows, march past commemorating the 45th anniversary of the 1971 student massacre known as, ”El Halconazo” or falcon strike, in Mexico City, Friday, June 10, 2016. Also known as the Corpus Christi Massacre, named for the Christian celebration, the attack was carried out by the Halcones, a government-trained paramilitary group, first beating the unarmed students with bamboo canes, followed by shooting at them. The Halcones then followed the injured to the hospital to finish off any survivors. (AP Photo/Nick Wagner)