Graded IR Class

Defense lines will include a 60-kilometer stretch of a "non-explosive barrier," thousands of kilometers worth of trenches for personnel, armored vehicles and communication lines, and 4,000 army dugouts, the statement said.

The United States is planning to build as many as 17 Ebola treatment centers in Liberia, with about 1,700 treatment beds, while the United Nations is planning an expanded mission in the region, based in Accra, Ghana, according to Anthony Banbury, the United Nation’s Ebola operation crisis manager. It is intended to be more nimble than the United Nations’ notoriously bureaucratic operations, bringing in as many as 500 trucks and jeeps from other missions in Africa, possibly paying teams in one country to speed up safe burials, buying fuel for monitoring teams in another country, or offering helicopters to transport health workers where they are needed.

Whether Sierra Leone’s lockdown will constitute an effective response is open to question. Despite the mobilization, the volunteers hardly appeared to be thick on the ground. In some neighborhoods, residents said they were yet to see any of the green-vested young men and women who had volunteered.

United Nations officials said Tuesday, estimating the cost of this effort at $1 billion.