BBC News:
President Barack Obama has called the Ebola outbreak in West Africa “a threat to global security”, as he announced a larger US role in fighting the virus.
The world was looking to the US, Mr Obama said, but added that the outbreak required a “global response”.
The measures announced included ordering 3,000 US troops to the region and building new healthcare facilities.
Ebola has killed 2,461 people this year, about half of those infected, the World Health Organization (WHO) said.
