By James Corbett:  As the scramble for Ugandan oil heats up, a documentary about Joseph Kony's 20 year campaign of terror has become an online cause celebre and is once again energizing the public for military campaigns abroad. But what is the public not being told about the background of US involvement in the region, and what will come of the public's growing support for military intervention? Find out more in this week's GRTV Backgrounder. …