for more on the line 3 pipeline, i spoke with minnesota public radio reporter kirsti marohn. ti, for our audience members kirsti, for members of our audience who haven't been paying attention, refresh us on what line 3 is about. >> sure. so, this project is a replacement to the existing line 3 pipeline, which is a crude oil pipeline that runs from the oil sands region of alberta, canada, cuts down through northern minnesota, and ends at enbridge's terminal in superior, wisconsin. so, that pipeline was built back in the 1960s. it's corroding and aging, and needs extensive maintenance, so it's been operating at about half capacity recently. so, enbridge wants to repla-- or, is replacing that pipeline with what they say will be a safer pipeline. it's newer construction, thicker steel, but it also follows a slightly different route through northern minnesota, and that's where some of the conflict has been coming in. >> sreenivasan: so, what is on that route that's controversial? >> well, this is a very water- rich region of northern minnesota. there's a lot of rivers and lakes and