The program was first authorized for South Sudanese nationals in 2011. The Department of Homeland Security said that “renewed peace in South Sudan” and “improved diplomatic relations” justified the move.

American forces are unlikely to be able to end a decades-long insurgency in Africa’s most populous country, despite President Trump’s order, officials said.

The namesake of Mazar-i-Sharif suffered countless cracks in a 6.3-magnitude quake, but, like Afghanistan, it has endured for centuries.