Ebola could shave more than $1 billion from the Democratic Republic of Congo’s economy, push almost 1 million more people into poverty and ripple across neighboring states as authorities struggle to contain an outbreak spreading through one of Africa’s most fragile regions, a United Nations assessment found.

The White House lashed out against the Smithsonian Institution’s leadership Monday, accusing the network that runs 21 museums of “extreme political activism” and failing to celebrate America.