Article Photos: Mexico swears in president amid violent protests 37/54

A protestor holds a rock during clashes with police outside the steel security barriers around the National Congress, where the swearing in of new Mexican President Enrique Pena Nieto is taking place in Mexico City, Saturday Dec. 1, 2012. Pena Nieto took power at midnight in a symbolic ceremony and will formally take the oath of office Saturday morning after campaigning as the face of a new PRI, a party that claims to be repentant and reconstructed after voted out of the presidency in 2000. (AP Photo/Eduardo Verdugo)