In 2009, documentarian Greg Barker made Sergio, a look at the unbelievable life of UN diplomat Sergio Vieira de Mello and his harrowing ordeal in a bomb blast in Baghdad. But Barker wasn't examining his subject. Now, 11 years later, Barker has made a new Sergio, his narrative fiction debut, examining the diplomat from a different vantage point. After a Sundance stint, the film comes to Netflix this spring -- and we have the official trailer. [caption id="attachment_866556" align="alignright" width="350"] Image via Netflix[/caption] Netflix vet Wagner Boura, best known as Pablo Escobar on Narcos, stars as …