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Time. and if you don't think this applies to you at all think again. ever uploaded a youtube video, a video of your kids birthday party where you sing happy birthday? ♪ happy birthday to you ♪ happy birthday to you that right there with the squirming kids is, in fact a copyright violation. copyright for "happy birthday" is fiercely protected. that's why you rare lly hear it sung in movies. under the legislation it is very unlikely that that family there would be prosecuted. the deeper problem is computers and internet are one biggie copyright infringement innocence. files can be copied and...

Engineers built an extensive system of levees to try to minimize that damage. that's not all they do. for years, this is how the army corps of engineers researched the impacts of flooding in the mississippi river delta. models built to scale to see what would happen if a barge tried to pass through flood gates. now it is using high-tech tools such as this computer simulator providing a realistic riverboat pilot's view. by far the biggest change has been that we have gone from the types of models that you see here to a combination of computer models and physical models of this type. >> reporter...