Asanda Zondi received a surprising phone call last Thursday, with orders to reach a health clinic in Vulindlela, South Africa, where he was participating in a research study that was testing a new device to prevent pregnancy and H.IV. infection.The trial was closing, told her a nurse. The device, a silicone ring inserted in its vagina, had to be removed immediately.When Mrs. Zondi, 22 years old, arrived in the clinic, learned why: the US agency for international development, which financed the study, had withdrawn financial support and had issued a stop-work order to all organizations all over the world who receive his money. The Brusca move followed an executive order of President Trump who freezed all foreign aid for at least 90 days. Since then, the Trump administration has taken measur...