As former director of the US Information Agency, Edward R. Murrow, once put it, presidential travel should be treated as a 'weapon' to influence popular opinion.
There has been recent speculation that governments could advise royal assent not be granted if bills are passed against their wishes. Here's why this is very unlikely to happen.
The Queen has been central to the achievements of the Commonwealth. Her son can do the same, if he stops being quite so petulant about it.
In the 1940s, the renowned Anglo-Australian artist became an outlaw just like his most famous subject, Ned Kelly.
It turned out to be a fairly minor announcement, but the palace knows how to work the news cycle.
It has been meticulously planned for ... but the end of the Elizabethan Age will throw up plenty of surprises.
Royal PR in pictures started with the Stuarts 400 years ago.
The saying goes, with age comes wisdom, but is that really true?