Just before Christmas, we learned of more violence in the world. In Berlin, Germany, a truck drove into a crowd of holiday shoppers at a Christmas market, killing at least 12 people and injuring as many as 50.
This attack came just hours after the assassination of the Russian ambassador to Turkey. The gunman was identified as a Turkish police officer who yelled, “Don’t forget Aleppo. Don’t forget Syria,” after he shot Andrei G. Karlov in the back.