A British union flag flies at half-staff atop Portcullis House, backdropped by Big Ben's clock tower in London, Monday, April 8, 2013, in respect for former British Prime Minister Margaret Thatcher who died Monday following a stroke at age 87.  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)