THIS WEEK WORLD

Outgoing Mexican President Felipe Calderon (left) presents the national flag to incoming President Enrique Pena Nieto during a power transition ceremony in Mexico City on December 1

People visit the Louvre Museum on the first day of its opening to the public on December 4 in Lens, north France. The Louvre opened a new satellite branch in the former mining town in an effort to bring high culture and visitors to one of Frances poorest areas

M23 rebels withdraw through a hillside after departing from the village of Karuba on November 30. Hundreds of rebels pulled out of frontline positions around Goma as promised under a regionally brokered deal, while government forces entered the key eastern city to resume control

Activists mark the 25th World AIDS Day on December 1 in Colombo

Smoke billows from the entrance of a collapsed expressway tunnel as police and fire workers gather for rescue operations in Koshu, 80 km west of Tokyo, on December 2

A Swiss shepherd dog feeds orphaned tiger cubs and her own cubs in the Black Sea resort of Sochi on December 4. The baby tigers were abandoned by their mother shortly after their birth in a local zoo