"Coal's Deadly Dust" and "Targeting Yemen" are both in this two-part hour per Frontline website."Coal's Deadly Dust" - FRONTLINE and NPR investigate the rise of severe black lung disease among coal miners, and the failure to respond. This joint investigation reveals the biggest disease clusters ever documented, and how the industry and the government failed to protect miners."Targeting Yemen" - Correspondent Safa Al Ahmad reports from inside Yemen, investigating the escalation of the U.S. fight against Al Qaeda and its impact on civilians. She travels to the front lines, visiting the sites of Special Forces raids and a deadly drone strike to shed light on how the U.S. counterterrorism strategy is playing out on the ground.