Meet the wide open mouths of Graciela Sacco's "Bocanada" series. This series (which translates to "mouthful") consists of eleven large pieces created in 1993. First displayed in Rosario, Argentina, these provocative semi-transparent prints, made with appropriated images, brought attention to socioeconomic and political concerns. Used for both mail and public poster art, the series became well known for calling attention to hunger and poverty in Argentina and across the globe. Sacco employed an early photographic technique called heliography to duplicate these images across the world. Though constrained by the limited colors that can result from heliography, she persisted in putting photographic images in unexpected places, hoping the viewer would be startled into appreciating the importance and urgency of the need for social change. Her Bocanada "interventions" have appeared in Buenos Aires, São Paulo, New York City, and beyond. Photos: 1. Untitled (#2), 1993, Graciela Sacco. Getty ...