We've all heard of sister cities, but do you know what yours are? In Los Angeles, we have 25. 25! Did you know that the national day of Croatia is Statehood Day (May 30)? Or that the currency of Lusaka is the kwacha? These tidbits might not be a big deal to you, but they matter to our sister citizens just a plane ride away from us. Be a good global citizen and spend two minutes finding out about your sister city. I guarantee you'll find something you didn't expect to learn today.