In The World This Week: A white police officer is cleared over the death of a black man for the second time in less than two weeks in the US, Germany mourns a young woman murdered after protecting two teenage girls who were being harassed, Russian President Putin is defiant in his end-of-year address, Syria's Bashar al-Assad speaks to magazine Paris Match, and a nativity scene in Nantes is at the heart of the latest controversy concerning the problematic relationship between France and religion.