Older adults tend to name events that occurred when they were between teens or twenties years of age simply means they are reminiscing which is the ability of an older adults to recall past experiences or event which in turn make them fulfilled as the look back at their lives and what happened in the past.
Reminiscing in older adults can often help them by giving them opportunity to talk about what is important to them thereby giving them more confident because they are happy when they recollect ,think or talk about stories from the pasts making them to recollect their long forgotten experience.
Each star means all of the 50 states because their are 50 stars. The 13 stripes mean the 13 British colonies that declared their independence from the King of Britain.