all of this happening in central paris. and i cannot wait to find out what kind of note these two men will strike when they meet. melissa, thanks. dozens of world leaders have marked to gather the 100 anniversary of the end of world war i. >> and they are honoring the sang sacrifices of many families. nick glass is still grieving the lot of four sons who were drafted in to the fight. ♪ >> reporter: the words were intended to give solace, he died for freedom and honor, every british and empire family who lost someone was sent a bronze memorial plaque. the name on this wone, charles, and along with newspaper cuttings now yellow with age and a few old black and white photo, these are treasured mementos from the great war. back then the bronze disks were known as dead man's penny.