Originally Posted by
cynicAAl
because bulk cash is obviously a weapon, explosive or incendiary and is therefore a threat to aviation security. Duh.
After looking at the 'Bulk Cash' link, I'm surprised TSA doesn't publish the rules for the public - on the website and at the checkpoint.
You have to take out all 'bulk cash', declare it and subject it to additional screening, just like you do medical liquids >3.4 ounces. Otherwise, if it is detected and you haven't declared it in advance, you are guilty of 'artful concealment'.