Margaret Thatcher through the years

Sept. 17, 1986: Former British Prime Minister Margaret Thatcher stands in a British tank during a visit to British forces in Fallingbostel, some 70 miles south of Hamburg, Germany. (AP)

Nov. 1, 2010: Former British Prime Minister Margaret Thatcher waves from her front doorstep as she returns home after leaving a hospital in London. (Reuters)

Sept. 17, 2010: Pope Benedict XVI is introduced to former British Prime Minister Margaret Thatcher in Westminster Hall, in the Palace of Westminster, in London. Pope Benedict, whowas on a four day visit to Scotland and England, visited the Westminster area to meet with the Archbishop of Canterbury and addressed British leaders. (Reuters)

June 8, 2010: Britain's Prime Minister David Cameron poses for a photograph with former Prime Minister Margaret Thatcher outside 10 Downing Street in London. (Reuters)

March 24, 1998: Former British prime minister Lady Thatcher is greeted by local officials clad in thawbs before opening a British trade fair in the northernmost of the seven emirates that make up the United Arab Emirates at the beginning of a three-day visit. (Reuters)

Nov. 15, 1986: Former British Prime Minister Margaret Thatcher and former U.S. Vice President George Bush pause for the press on the porch of the Vice President's residence before a breakfast meeting. (Reuters)

June 9, 1983: Former British Prime Minister Margaret Thatcher leaves the Castle lane, Westminster, London England polling station with her husband, Dennis, after casting their votes in the general election . (AP)

March 10, 1983: Former Prime Minister Margaret Thatcher examining a minefield during her visit to the Falkland Islands when the Royal Engineers took her on a tour of the Rookery Bay beach, a heavily mined area in the Falklands. (AP/File)

Sept. 24, 1982: China's former Chairman of the Communist Party, Deng Xiaoping, meets with former Britain Prime Minister Margaret Thatcher, in Beijing. (AP/File)

June 23, 1982: Former President Ronald Reagan and British Prime Minister Margaret Thatcher speak to reporters at the White House in Washington. (AP)

June 6, 1982: In this file photo, former U.S. President Ronald Reagan and Britain's Prime Minister Margaret Thatcher have lunch at the Palace of Versailles, France, following the first session of the second days summit meeting. Margaret Thatcher felt betrayed by close ally Ronald Reagan over the Falkland Islands, according to newly released papers that reveal how isolated Britain's prime minister was in her determination to repel the Argentine invasion by force. When Argentina seized the British territory off the South American coast in April 1982, Thatcher's government presented a united front in public. (AP/File)

April 30, 1982: This file photo shows former British Prime Minister Margaret Thatcher, during her election tour in London. (AP/File)

Aug. 1, 1979: This file photo shows Britain's Queen Elizabeth II talking with former British Prime Minister, Margaret Thatcher, left, at a reception for the 39 heads of delegations attending the Commonwealth Conference in Lusaka, Zambia. (AP)

Feb. 10, 1975: Margaret Thatcher, the leading conservative who won the first ballot for leadership which resulted in Edward Heaths resignation, speaks in London. (AP/File)