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"staying well" brought to you by aleve. >> this week's "staying well" features an exercise called foam rolling. it's similar to yoga. it's becoming a popular way to release tension and improve mobility. >> foam rolling is a tool essentially. it's a piece of foam that you use for stretching, self-massage. >> you are essentially using your body weight on a foam roller to decrease the tension in the muscle and get rid of the knots and trigger points. >> you'll do some scissor kicks. >> home rolling is good for increasing range of motion, blood flow to the area, improving and maintaining tissue he...

Pinger batteries die, it will become a much longer search. we're not then talking months. we are now talking years. side scan sonar has its limitations. it can reach out approximately one-half mile from its bottom, and each lateral side. and has to be towed at about 3 knots. and so it can -- it can take a very, very long time to try and locate the wreckage. in addition, you have the acoustic anomalies that were described by angus houston's subordinates during the press conference. the pingers can behave in a very funny acoustical way in deep, deep water in which they're located. the sound sign...