Tar Sands Oil is oil mixed with sand. Sand is an abrasive. These pipelines are literally being sandblasted from the inside out. The question is not "IF" they'll leak (because the answer is an emphatic "YES" they'll leak) the question is when, where and how often they'll leak. The first pipeline in 2010 sprung 13 leaks in under 12 months. We cannot allow any pipelines to carry tar sand oil.