Another rookie mistake. My 2nd trip, before we left, for about 6 months, I saved all the nickels and quarters I had. I rolled them and put them in a big ziplock in my carry on. Well, 1st of all, if lugging all that extra weight wasn't dumb enough, I also got flagged for a search because I had a ''mass'' on the X-ray. If those weren't bad enough, I was loudly informed by the screener that I can get change ANYWHERE in Vegas and how much easier it would be to just carry bills.