King Charles III's coronation: The bloody history behind some of the crown jewels

This weekend, at the coronation of King Charles III, not all that glitters will be gold. Some of it will be jewels — and more than a few of those jewels have tragic, blood-soaked histories behind them. Since Queen Elizabeth II's death in September, her son Charles has ruled, but May 6 marks the official coronation when Charles becomes monarch of the United Kingdom of Great Britain and Northern Ireland. It's the 40th such ceremony, though the last coronation took place back in 1953, when Elizabeth took the throne to...