Associated Press: Europe’s best known landmarks — including the Eiffel Tower, Big Ben and Rome’s Colosseum — fell dark Saturday, following Sydney’s Opera House and Beijing’s Forbidden City in joining a global climate change protest, as lights were switched off across the world to mark the Earth Hour event. In the United States, the lights went out at the Empire State Building in New York, the National Cathedral in Washington, D.C., and the Coca-Cola headquarters in Atlanta, among many other sites in …