W5 takes viewers underground with a look at sewer pipes and the growing problem of gas lines punched through them. It’s called a cross-bore, out-of-sight and out-of-mind, unless someone makes the potentially explosive mistake of cutting through it. W5 speaks to Trista Meehan, a Minnesota woman who lost her home when it blew up after a plumber tried to clear the main sewer line. Canada’s gas companies have remarked that cross-bore awareness must become part of the DNA of anyone rooting around anywhere near a gas pipeline.