Obama cites security threat, expands US role in fighting Ebola

President Barack Obama on Tuesday called West Africa's deadly Ebola outbreak a looming threat to global security and announced a major expansion of the U.S. role in trying to halt its spread, including deployment of 3,000 troops to the region.

"The reality is that this epidemic is going to get worse before it gets better," Obama said at the Atlanta headquarters of the U.S. Centers for Disease Control and Prevention (CDC).