Last month, a surprisingly large number of people showed up at a remote northern Michigan park to rally against something that, weeks earlier, few of them had ever heard about: the twin, 60-year-old pipelines that transport 22 million gallons of oil a day beneath the Straits of Mackinac. Attracting a crowd to a distant location for a rally about a largely unknown pipeline is impressive; so is reviving a moribund organization to produce the event in just six weeks.