Retired footballer David Beckham and Chinese basketball megastar Yao Ming will film two announcements with the Duke of Cambridge as part of a campaign against illegal wildlife products.
The videos aim to reduce deman for rhino horn and ivory and will be aired globally.
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Armed police have taken part in a dramatic training exercise aimed at recreating the chaos of a Paris-style terror attack.
After a remarkably mild November - a notable mild start to the new month.
The Facebook founder revealed the plan as he and wife Priscilla Chan announced the birth of their baby daughter, Max.