A British union flag flies at half staff atop Portcullis House, backdropped by Big Ben's clock tower in London, in respect for former British Prime Minister Margaret Thatcher who died Monday following a stroke at age 87, Monday, April 8, 2013. Flags were flown at half-staff at Buckingham Palace, Parliament and Downing Street in honour to the 87-year old Iron Lady, and Queen Elizabeth II authorized Thatcher to have a ceremonial funeral to be held at St. Paul's Cathedral in London with military honors. (AP Photo/Sang Tan)