Archbishop Richard Moth was speaking to a 2,000-strong congregation during his installation at Westminster Cathedral.
Trump will discuss the "reduction of nuclear weapons" during the unprecedented talks, a spokeswoman says.
Supermarkets have started selling Christmas trees - six weeks out from the big day.
The next title in the series is expected to be the biggest video game release ever.
How the parents of Keaton Slater, 12, battled to bring the man who killed him to justice.
These stories represent the consequences of changes that began years ago, rather than being a sudden cultural shift.
It's a weekend of two halves with a cold start on Saturday giving way to wetter and milder day on Sunday.
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