Strong Hearts for Greater Serbia. These are the older boys and girls in the American Red Cross orphanage at Belgrade at their calisthenics. The younger children are lined up along the side waiting their turn. These war orphans were picked up on the streets with ragged clothes and more ragged prospects. But these exercises, good food, and Red Cross nurses, are doing wonders for the children. They are all taught trades, in additions to their regular school studies, and when they are old enough to leave the orphanage they can easily support themselves