North Korean negotiator arrives in the US ahead of another possible Trump-Kim summit.
International researchers say a radical shift in diet is needed to preserve the planet.
News and issues making the headlines each day.
Will today's "meaningful vote" give Theresa May the go-ahead for her Brexit deal?
Nazanin Zaghari-Ratcliffe is protesting against being denied specialist medical care
Reuters reporters Wa Lone and Kyaw Soe Oo to remain in jail after losing appeal
Felix Tshisekedi is named President of DR Congo after a fiercely contested election
In a TV address, President Trump called the situation on the Mexico border a "crisis".
The visit comes amid reports of plans for a second summit between North Korea and the US
John Bolton attends talks in Turkey amid uncertainty over US troop withdrawal in Syria.