US: Maggie 'champion of liberty'

US President Barack Obama has led global tributes to Lady Thatcher, saying the "world has lost one of the great champions of freedom and liberty".

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Thatcher receives warm transatlantic tributes

In the 1980s Margaret Thatcher strode onto the world stage alongside US President Ronald Reagan - who became a political and personal friend.

Recognition of her importance as international leader was reflected in the warmth of today's transatlantic tributes.

ITV News Washington Correspondent Robert Moore reports.

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