Marko comes from a Croat family and so has a double citizenship, both Bosnian and Croat. That means he can travel to the European Union without the visa that is needed by those who only have a Bosnian passport.
He volunteers for the same Catholic youth center where Ivana uses to go, Ivan Pavao II. In the summer they organize work camps with teenagers coming mainly from Germany. All together they do some volunteer work to help old people who often live alone in old run down flats, mostly in the old part of town.