The argentinian artist talks about her work ¿Por qué disparan?, exhibited in the 20th Contemporary Art Festival Sesc_Videobrasil. On September 26, 2014, forty-three students travelling to Mexico City to take part in a demonstration in memory of the Tlatelolco Massacre disappeared in Iguala. Grainy and intermittent images, found in survivors’ cell phones, translate the perplexity at the lack of an explanation of what happened. The artist states:  “En México desaparecieron 43 estudiantes hace tres años. Y es una pregunta que está abierta, todavía no entendemos por qué”