Sergio Vieira de Mello devoted his career to dealing with humanitarian crises throughout the world...until he was killed by a suicide bomber in Iraq 5 years ago. Pulitzer Prize-winning journalist Samantha Power tells us about the former UN High Commissioner's life. Also: the status of arts education in NYC’s public schools. Antonio Skarmeta's new novel. And on Underreported: what Liberia's president Ellen Johnson-Sirleaf is doing to help her country recover from brutal civil war.