Chinese dissident artist and iconoclast Ai Weiwei presents an anger-inducing but compassionate look at modern- day diasporas and the immigrant whirlwind affecting 65 million people globally. Ambitiously shot in 23 countries and using a crew of hundreds, Weiwei’s lengthy documentary presents the refugee crisis in stark terms. People — including children — are dying, fleeing their homelands due to war, famine, genocide, and drought, only to face still more hardships on the long road to sanctuary in foreign, sometimes inhospitable, unwelcoming lands. Beautiful drone photography underscores the vast scope of the crisis. But Weiwei always takes us in for a closer look at the many faces — young and old, male and female, desperate and poor — that make up this human river, tragically destined only to grow wider. Rated PG-13. 140 minutes. The Screen.