could have retreated to a life of luxury and ease. but he chose to live life in the arena. sailing sometimes against the wind. sometimes with it. and that's why 50 years later, john f. kennedy stands for prosperity as he did in life. young, bold, and daring. and he stays with us in our imagination. not because he left us too soon. but because he embodied the character of the people he led. resilient. resolute. fearless and fun-loving. defiant in the face of impossible odds. and most of all, determined to make the world anew. not settling for what is. but rather, for what might be. >> earlier, the obamas and the clintons laid a wreath at president kennedy's grave.