PARIS, June 14, 2016 (Xinhua) -- The Eiffel Tower is illuminated in the colors of the U.S. flag to pay tribute to Orlando nightclub shooting victims, in Paris, France, June 13, 2016. At least 50 people were killed and 53 others wounded early Sunday in the shooting at the popular gay nightclub Pulse in Orlando, Florida, the United States. (Xinhua/Li Genxing)