Nightline Podcast - July 24, 2014

In tonight's episode, entrepreneurs and inventors seek to change their lives forever as Walmart hears pitches for the next million-dollar idea. It's hard enough to play a historical figure on screen, but as actor Chadwick Boseman tells us, being able to sing and dance like like James Brown made filming "Get on Up" that much more of a challenge. And the trailer for "50 Shades of Grey" leaves many fans less than satisfied. 

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