ABC: President Obama is expected to make a decision on the proposed Keystone XL Pipeline the coming months.
If approved, it would carry tar sands from Canada, through South Dakota, to the Texas Gulf Coast.
On one side, the president faces pressure from political and business interests - both domestic and abroad - to get the pipeline built.
Then, there's the opposition. South Dakota's Tribes have been some of project's most vocal - and visible - dissenters. A camp now sits near the proposed KXL...