When Sarah Hall arrived to run Rwanda's oldest national park in 2010, its rangers could barely cope with poachers who were trapping hippos in snares for food. The rhinos had vanished. The lions had been wiped out.Last year, the... " />

Africa’s biggest conservation success was once a poachers’ paradise

When Sarah Hall arrived to run Rwanda’s oldest national park in 2010, its rangers could barely cope with poachers who were trapping hippos in snares for food. The rhinos had vanished. The lions had been wiped out.Last year, the…