Lights across Britain switched off for an hour on Monday night in a tribute to the dead of World War I inspired by the prophetic observation of Britain's foreign minister on the eve of war 100 years ago.
"The lamps are going out all over Europe," Edward Grey told an acquaintance, shortly before Britain declared war on Germany on Aug. 4, 1914. "We shall not see them lit again in our lifetime."
British landmarks, including the Houses of Parliament, Tower Bridge and St. Paul's Cathedral, went dark from 10 p.m. local time, and Prime Minister David Cameron had asked Britons to switch off all but a single light in their homes for an hour.