Busan, Korea – Pan Jianlin’s documentary about the earthquake that struck Sichuan province on May 12 made a quiet debut on a Sunday morning, at 10 a.m., the third day of this year’s Pusan International Film Festival. With its not-so-great timing and grim title, Who Killed Our Children was a blip on the festival calendar’s 315 films and 85 world premieres. And if you happened to miss the documentary in Korea, it’s possible you will not have an opportunity to see it again. Pan’s film’s subject is as simple as its title, examining the collapse of one of the many schools that became deathtraps for thousands of children after the quake. That subject has been a closed one in official Chinese media since mid-summer which makes Pan’s exploration of...