I just returned from Ecuador, where the US Dollar is the unit of currency, and has been, for the last three years. Counterfeiting is rampant there, and every single time I pulled out a twenty, the recipient held it up to the light to look for the security bar. I wonder what they'll do when they see the new ones. I'm sure they won't hear about it or see them as quickly as we do. When they went to the dollar, some of the locals wouldn't accept them because they thought it was a joke.
Did you know that several other countries also use the US Dollar for their unit of currency? I knew about Ecuador, but I wasn't aware of others until just last week! Ecuador, Palau, East Timor, Panama and the Federated States of Micronesia all use the US Dollar. Argentina did until just last year.
Here's a larger version of the new twenties:
