The State Department is restarting the processing of visa applications from students and visiting scholars, but is screening for “hostility” toward the United States.

The drug could change the course of the AIDS epidemic. But the Trump administration has gutted the programs that might have paid for it in low-income countries.

The budget cuts threaten global progress on everything from heart disease to H.I.V. — and could affect American drug companies, too.

The administration gave the nations 60 days to fix concerns, according to a State Department cable. The president already imposed a full or partial ban on citizens of 19 countries.

Insurgents are expanding from West Africa’s Sahel region toward Atlantic coastal nations such as Ivory Coast, creating new terrorism hot spots and displacing millions.

Eight families of Mennonites have moved from Mexico to Angola, in southern Africa, raising fears among some Angolans that they will be squeezed out by the new arrivals.

A master of the kora who worked with Herbie Hancock and Philip Glass, his career was powered as much by experimentation as by reverence for tradition.

West African nations are struggling to track and treat infections, and experts warn the outbreak is rapidly spreading, while the United States is cutting global vaccination efforts.

Policymakers in many countries assume that birthrates have fallen because people want fewer children, but a global study says financial insecurity is driving those decisions.

The authorities were still searching for four children. Inclement weather has left thousands displaced.

Experts who study protest movements say the scenes unfolding in California broadly follow a script that has played out many times in other countries — sometimes with deadly consequences.

African students have traded academic institutions in the West for Chinese alternatives. The Trump administration’s clampdown on international students and visas could accelerate the shift.

Seven of the 12 countries on President Trump’s new list are on the continent, where some said the policy was discriminatory and would unfairly affect their future.

Mr. Lungu, who was recently barred by a court ruling from running for president again, left a checkered legacy, with allegations that he eroded freedoms while in office.

The travel ban revives an effort from President Trump’s first term that led to chaos and court battles.

The spending proposal terminates support of health programs that, according to the proposal, “do not make Americans safer.”