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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Joshua beat the older, more experienced boxer in front of 90,000 fans in Wembley Stadium.
Dry for most of the night. Rain in the southwest by dawn.
Host Paddy McGuinness tweeted a tribute to contestant Charlie Watkins whose date was featured in Saturday's episode.