The Ebola epidemic in West Africa is already the deadliest on record, having killed more than 2,400 people. Health experts warn it could get much worse, if the spread of the disease isn't contained quickly.

That alarm has President Obama meeting today with experts from the Centers for Disease Control and Prevention in Atlanta. Obama is expected to announce a major buildup in U.S. efforts to address the threat of Ebola.

"The United States has unique capabilities in a wide range of areas," says White House spokesman Josh Earnest. "And that means the U.S. has a unique responsibility to step up in the midst of an international crisis."

The Defense Department plans to establish a medical beachhead in Liberia, the hardest-hit country, offering engineering support to build 17 new treatment centers, with 100 beds each. The military will also develop a facility to train up to 500 health care workers every week.

Officials say the U.S. military will serve as a backbone, encouraging other countries to offer their own assistance. The United Nations Security Council will hold an emergency session Thursday to discuss Ebola. And U.S. Ambassador Samantha Power has asked countries to come with concrete commitments to fight the disease.

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