The new American Secretary of State John Kerry has arrived in the UK for his first official overseas visit.
He will visit nine nations over the course of an 11-day trip on which he is expected to focus on the conflicts in Syria, Mali and Afghanistan.
More top news
Giraffes could disappear from the planet if current rates of extinction continue, it has been warned.
Foreign Secretary Boris Johnson has been filmed accusing British ally Saudi Arabia of "puppeteering" in the Middle East.
Psychotic illnesses such as schizophrenia may be linked to immune system disorders, research has found - opening up new treatments.