Twenty years on, Falungong survives underground in China

It is a shadow of the Falungong spiritual movement's heyday in China, where the group once boasted more than 70 million followers before it was outlawed in 1999, giving police carte blanche to persecute members. But 20 years on, the group has remained stubbornly persistent, even as practitioners in mainland China continue to face arrests and torture, according to rights groups.