Detailed text transcripts for TV channel - CNN - 20100423:05:42:00
>> reporter: when great white sharks start to circle your boat, the feeling is unsettling. 15 feet long, thousands of pounds, these are the animals of so many nightmares. we've come to dive with these great whites, to get an up close look at them and the battle that's being waged around them. >> please, do not go down unless we tell you to. >> reporter: mike rutsin takes tourists cage diving off the coast of south africa. >> you can lean back and become comfortable. >> reporter: it's become a big business, but he also says it's a conservation effort. he thinks if people can see these endangere...