Reconsideration hearings for the proposed expansion of the Trans Mountain pipeline continue this week in B.C. This is the same pipeline that the federal government bought for $4.5-billion, only to have a Federal Court of Appeal delay construction because the review didn't consider oil tanker traffic, or consult enough with Indigenous groups. UBC professor Kathryn Harrison lays out what it might take to get the proposed Trans Mountain pipeline expansion through, and what it could take to stop it.