[splashing] genevieve long: here is some just off the top of the water. it's sticky. it's extremely sticky. betty: very sticky. genevieve: it smells awful. betty: in march 2013, a shallow underground pipeline owned by exxonmobil burst, sending oil running down a mayflower residential street, as can be seen in this video. tom: the smell is unbelievable. i mean, look. there's oil. betty: the oil flowed down the street through a drainage ditch and emptied into a marshy area. the heavy crude had come from alberta, canada, thousands of miles away. tom: what are the booms for? geneivieve: they are to soak in the oil. they are supposed to -- tom: literally? geneivieve: yeah. literally -- tom: that is what they are for? geneivieve: yes. they are supposed to repel water and soak in oil. betty: steyer had come to mayflower to gather ammunition for what may be the biggest fight of his life -- trying to stop the keystone xl pipeline from being built. steyer worries more leaks like this one in mayflower could happen. the proposed keystone pipeline would stretch from the canadian bo