Article Photos: Mexico swears in president amid violent protests 46/54

A member of Mexico's National Congress holds a poster with an image of outgoing President Felipe Calderon that reads in Spanish: "You are giving a chair bathed in blood," prior to the inauguration ceremony of incoming President Enrique Pena Nieto in Mexico City, Saturday, Dec. 1, 2012.  Pena Nieto took the oath of office as Mexico's new president on Saturday, bringing the old ruling party back to power after a 12-year hiatus amid protests inside and outside the congressional chamber where he swore to protect the constitution and laws of the land. (AP Photo/Alexandre Meneghini)