Some have asked me what the big deal is here. Why wouldn't the guy just tell the TSA what the money was for and what he had intended to do with it even though he was perfectly within his legal right to possess money and bring it on an airplane.
What was mentioned briefly in the video was this report which identifies supporters of Ron Paul and the Campaign for Liberty as potential domestic terrorists involved in the modern-day militia movement. Ironically, the Campaign for Liberty held their regional conference in St. Louis, Missouri (the state from where the report came) which had over 1000 in attendance with many high profile speakers including Judge Andrew Napolitano. (former federal judge)