Obama says Ebola outbreak a 'global security threat'
US President Barack Obama has called the West Africa Ebola outbreak "a threat to global security" as he announced a larger US role in fighting the virus.
"The world is looking to the United States," Obama said, but added the outbreak required a "global response".
The measures announced included ordering 3,000 US troops to the region and the US will also set up a command and control centre in the capital of Liberia, the hardest-hit country, build new treatment centres and train health workers.
The Health Organization says he Ebola epidemic has killed more than 2,461 people in Guinea, Liberia, Nigeria and Sierra Leone this year.