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This is a Aug. 1, 1979 file photo of Britain's Queen Elizabeth II talks with British Prime Minister, Margaret Thatcher, left, at a reception for the 39 heads of delegations attending the Commonwealth Conference in Lusaka, Zambia. Former British Prime Minister Margaret Thatcher, whose conservative ideas made an enduring impact on Britain, died Monday April 8, 2013. She was 87. (AP Photo, File) ( Britain Obit Thatcher )

A picture dated September 9, 1980 shows British Prime Minister Margaret Thatcher attending the 5th Franco-British summit in Paris. Former British prime minister Margaret Thatcher, the "Iron Lady" who shaped a generation of British politics, died following a stroke on April 8, 2013 at the age of 87, her spokesman said. GABRIEL DUVAL/AFP/Getty Images ( 518730664 )

Former British Prime Minister Margaret Thatcher arrives for a service of thanksgiving and re-dedication on Battle of Britain Sunday at Westminster Abbey in London in this September 19, 2010 file photo. Thatcher has died, according to Sky TV. REUTERS/Luke MacGregor/Files ( BRITAIN/ )

British Prime Minister Margaret Thatcher stands in a British tank during a visit to British forces in Fallingbostel, some 120km (70 miles) south of Hamburg, Germany. on Sept. 17, 1986. Thatchers former spokesman, Tim Bell, said that the former British Prime Minister Margaret Thatcher had died Monday morning, April 8, 2013, of a stroke. She was 87.(AP Photo/Jockel Fink) ( Britain-Obit-Thatcher )

Baroness Thatcher examines a sheet of bullet-proof material during a visit to a factory producing ballistic and blast protection products in this April 9, 1997 file photo. Margaret Thatcher, the "Iron Lady" who dominated British politics for two decades, died on April 8, 2013 following a stroke, a spokesman for her family said. She was 87. REUTERS/Michael Crabtree/Files ( BRITAIN-THATCHER/ )

Baroness Thatcher Dies Aged 87 - Thatcher On The World Stage (Photo by Keystone/Getty Images) ( 2628488 )

In this June 12, 1987 file photo, British Prime Minister Margaret Thatcher waves to supporters from Conservative Party headquarters in London after claiming victory in Britain's general election. Ex-spokesman Tim Bell says that Thatcher has died. She was 87. Bell said the woman known to friends and foes as "the Iron Lady" passed away Monday morning, April 8, 2013. (AP Photo/File) ( Britain Obit Thatcher )

This is a Sept. 24, 1982 file photo of China's Chairman of the Communist Party Deng Xioping as he meets with Britains' Prime Minister Margaret Thatcher, in Beijing, China. (AP Photo/File) ( Britain Thatcher China )

When not engaged in her political work in Dartford (Kent) where she is standing as Tory candidate, Miss Margaret Roberts, youngest candidate for the general election, is busy with her work as a research chemist. Margaret Roberts went on to become Prime Minister Margaret Thatcher. (Photo by Chris Ware/Keystone Features/Getty Images) ( 3307212 )

In this Dec. 17, 1979 file photo, British Prime Minister Margaret Thatcher reviews the honor guard at the White House in Washington, as President Jimmy Carter follows. At left in Col. Stanley Bonta, commander of the guard. Ex-spokesman Tim Bell says that Thatcher has died. She was 87. Bell said the woman known to friends and foes as "the Iron Lady" passed away Monday morning, April 8, 2013. (AP Photo/File) ( Britain Obit Thatcher )

Conservative MP Margaret Thatcher has fun on a ski run in Battersea Park with instructor Joe Hoki. (Photo by Reg Lancaster/Express/Getty Images) ( 3267466 )

This is a June 9, 1983. file photo of 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 . Former British Prime Minister Margaret Thatcher, whose conservative ideas made an enduring impact on Britain Monday April 8, 2013, has died. She was 87. (AP Photo/Peter Kemp) ( Britain Obit Thatcher )

A picture dated August 26, 1998 shows Israeli Prime Minister Benjamin Netanyahu (R) receiving former British prime minister Margaret Thatcher in Jerusalem. Former British prime minister Margaret Thatcher, the "Iron Lady" who shaped a generation of British politics, died following a stroke on April 8, 2013 at the age of 87, her spokesman said. DAOUD MIZRAHI/AFP/Getty Images ( 518730612 )

In this May 31, 1983 file photo, Britain's Prime Minister Margaret Thatcher raises her finger as she makes a point during a Conservative Party news conference in London. Ex-spokesman Tim Bell says that Thatcher has died. She was 87. Bell said the woman known to friends and foes as "the Iron Lady" passed away Monday morning, April 8, 2013. (AP Photo/File) ( Britain Obit Thatcher )

Then Britain's Prime Minister Margaret Thatcher wears a checkered green hat on her 60th birthday as she attends church near her official country residence, Chequers, near Aylesbury, England in this October 13, 1985 file photo. Thatcher has died following a stroke, a spokesman for the family said. REUTERS/Brian Smith/Files ( BRITAIN-THATCHER/ )

Margaret Thatcher makes a statement to reporters as Denis Thatcher listens, as she leaves No. 10 Downing Street, Westminster in a Wednesday, Nov. 28, 1990 file photo, for Buckingham Palace where she will resign as Prime Minister to Queen Elizabeth II. Thatchers former spokesman, Tim Bell, said that the former British Prime Minister Margaret Thatcher had died Monday morning, April 8, 2013, of a stroke. She was 87. (AP Photo/Martin Cleaver, File) ( Britain-Obit-Thatcher )

Gordon Brown, U.K. prime minister, right, and his wife Sarah, left, stand with Margaret Thatcher, the former U.K. Prime Minister, center, on the steps of 10 Downing Street, in London, U.K., on Monday, Nov. 23, 2009. Thatcher, the former U.K. prime minister who helped end the Cold War and was known as the ìIron Ladyî for her uncompromising style, died today. She was 87. Photographer: Simon Dawson/Bloomberg *** Local Caption *** Gordon Brown; Sarah Brown; Margaret Thatcher ( U.K. THATCHER DIES AT 87 )

APRIL 8: Lord Bell, spokesperson for Baroness Margaret Thatcher, announced in a statement that the former British Prime Minister died peacefully following a stroke aged 87. British prime minister Margaret Thatcher (right) holding a chimpanzee. (Photo by Keystone/Getty Images) ( 2628486 )

Margaret Hilda Thatcher, nee Roberts, as the Conservative candidate for Dartford, Kent, and before she married husband Denis. (Photo by Chris Ware/Getty Images) ( 2635699 )

Margaret Hilda Thatcher, nee Roberts greets President Elect of the European Communities, Jacques Delors, a French Politician, at Downing Street in London. (Photo by Keystone/Getty Images) ( 2638921 )

November 1976: Conservative party leader Margaret Thatcher makes a 'victory' sign outside her home in Chelsea, London. (Photo by John Minihan/Evening Standard/Getty Images) ( 3228592 )

Irish Prime Minister Charles Haughey, on the steps of 10 Downing Street, London, with Margaret Thatcher, the British prime minister. (Photo by Keystone/Getty Images) ( 3260415 )

Conservative candidate Margaret Roberts accompanies four voters on the piano in a sing-song after a brief political argument in the bar of The Bull Inn, Dartford. (Margaret Roberts married Denis Thatcher and went on to become Prime Minister.) (Photo by Keystone/Getty Images) ( 3267269 )

British Conservative Prime Minister, Margaret Thatcher, with French President Valery Giscard d'Estaing at a press conference. (Photo by Keystone/Getty Images) ( 3269214 )

British prime minister, Margaret Thatcher, leaving Downing Street after the announcement that British Forces have landed on the Falkland Islands. (Photo by Central Press/Getty Images) ( 3319983 )

British prime minister Margaret Thatcher and her German counterpart, Helmut Kohl, at a press conference at Number 12 Downing Street, London. (Photo by Keystone/Getty Images) ( 3435862 )

Youngest election candidate, conservative, Margaret Roberts (later Thatcher) buys a pint of peanuts and studies the quality of a lemon while shopping in Dartford, Kent, England in 1950, where she is standing as Tory M.P. Thatchers former spokesman, Tim Bell, said that the former British Prime Minister Margaret Thatcher had died Monday morning, April 8, 2013, of a stroke. She was 87. (AP Photo, File) ( Britain-Obit-Thatcher )

A picture dated Ocotber 13, 1989 shows then British Prime Minister Margaret Thatcher acknowledging applaud on at the end of the Conservative Party conference in Blackpool. Former British prime minister Margaret Thatcher, the "Iron Lady" who shaped a generation of British politics, died following a stroke on April 8, 2013 at the age of 87, her spokesman said. JOHNNY EGGITT/AFP/Getty Images ( 518729997 )

A picture dated November 16, 1988 shows then British Prime Minister Margaret Thatcher dancing with then US President Ronald Reagan following a state dinner given in her honor at the White House. Former British prime minister Margaret Thatcher, the "Iron Lady" who shaped a generation of British politics, died following a stroke on April 8, 2013 at the age of 87, her spokesman said. M. SPRAGUE/AFP/Getty Images ( 518730576 )

In a Feb. 4, 1975 file photo, Margaret Thatcher gets a kiss from her husband Denis in London, Feb. 4, 1975, after she had come out on top with 130 votes in the first round of the election for the Conservative party leadership. Thatchers former spokesman, Tim Bell, said that the former British Prime Minister Margaret Thatcher had died Monday morning, April 8, 2013, of a stroke. She was 87 years old. (AP Photo/File) ( Britain-Obit-Thatcher )

Britainís Conservative Party leader, Mrs. Margaret Thatcher, takes a stroll through the grounds of Scotney Castle in Kent, England, where she is a tenant of a National Trust flat, with her husband Denis, and their twins Mark and Carol, in photographed in March 1979. Thatchers former spokesman, Tim Bell, said that the former British Prime Minister Margaret Thatcher died Monday morning, April 8, 2013, of a stroke. She was 87. (AP Photo, File) ( Britain-Obit-Thatcher )

Workmen lower Britain's Union flags to half-mast above 10 Downing Street in London, on April 8, 2013, following the death of former British Prime Minister Margaret Thatcher. Margaret Thatcher, the "Iron Lady" who shaped a generation of British politics, died following a stroke on Monday at the age of 87, her spokesman said. LEON NEAL/AFP/Getty Images ( 518730709 )