June 12, 2009 4:54 pm Staying Sharp Into Your Golden Years While a certain amount of cognitive decline is a normal part of the aging process, some seniors keep their wits long into the twilight years. US & World Videos 1:36 Arizona Senate repeals 1864 abortion ban 3:37 4.1-magnitude earthquake shakes Corona 1:40 Democrats say Big Oil misled public for decades about climate change 2:56 Police putting up barricades on UCLA campus after overnight brawl 4:00 Firecrackers thrown at pro-Palestinian encampment during protester clash at UCLA