Margaret Thatcher Dead at 87

Margaret Thatcher, the first woman ever to serve as prime minister of Great Britain and the longest-serving British prime minister of the 20th century has died at age 87.

"It is with great sadness that Mark and Carol Thatcher announced that their mother Baroness Thatcher died peacefully following a stroke this morning," Lord Timothy Bell said today. "A further statement will be made later." 

Thatcher had significant health problems in her later years, suffering several small strokes and, according to her daughter, struggling with dementia.

In Dec. 2012, she was underwent an operation to remove a bladder growth, longtime adviser Tim Bell told The Associated Press.

But during her long career on the political stage, Thatcher was known as the Iron Lady. She led Great Britain as Prime Minister from 1979 to 1990, a champion of free-market policies and adversary of the Soviet Union.