Hard Knocks started giving NFL fans more insight into the "behind the scenes" world of football in 2001. Social media began to emerge in the early '00s, which means this reality documentary-style series was one of the first ways fans got exclusive views on how teams prepared for the upcoming season. From players getting injured or rehabbing, rookies with a chip on their shoulders, or veteran players out to prove they still got it, those at home see the ups and downs of football life. Hard Knocks now has different segments: Training Camp, In Season, andOff Season, and the lights are always shining on a different team. This time, for Hard Knocks: Training Camp, the Buffalo Bills are the stars.

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