CNN At This Hour With Berman and Michaela April 8, 2014 15:33:00
>> they are encouraged about the longer periods of time. that's a lot more credible. the individual pings, they're sea life that sounds very much like it in this part of the indian ocean. >> we talked about the currents and how noise is affected. really fascinating. >> tomorrow physics. >> tyou got it. ahead this hour, a dance instructor who lost part of her leg in the boston marathon bombing. she didn't just fulfill her vow to walk again, she got back to doing what is he lovshe loves t. dancing. >> and even more than that she taught anderson cooper how to dance. co: sometimes you don't know...
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