Pope Benedict XVI speaks with the astronauts on Saturday . The pope is expected to speak at a Mass in St. Peter's Square later this week and will be joined by other world leaders including President Barack Obama and Russian leader Vladimir Putin. The pope acknowledges Cmdr . `` We fly over most of the world and we do n't see borders , but at the same time we realize that people fight with each other and there is a lot of violence in this world , '' Kelly said . Mark Kelly 's wife , Gabrielle Giffords .
Pope Benedict XVI speaks with the astronauts on Saturday . The pope is expected to speak at a Mass in St. Peter's Square later this week and will be joined by other world leaders including President Barack Obama and Russian leader Vladimir Putin. The pope acknowledges Cmdr . Mark Kelly 's wife , Gabrielle Giffords .