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.
More top news
At least 52 people have been killed after a fight broke out between two rival drugs gangs in a Mexico prison.
Lord Coe has accused Nestle of hypocrisy following its decision to withdraw sponsorship from the IAAF Kids' Athletics Programme.
The traffic on British roads hit its highest ever level last year, with congestion continuing to rise, official figures show.