Jimmy and Rosalynn Carter are marking their 77th wedding anniversary with a quiet Friday at their south Georgia home, extending their record as the longest-married first couple ever as both face significant health challenges. The 39th president is 98 and has been in home hospice care since February. The former first lady is 95 and has dementia. The Carter family hasn't offered details of their conditions but has said they both have enjoyed time with each other and a stream of family members, along with occasional visits from close friends, in recent months. Their grandson Jason Carter said it's been gratifying for the Carters and their family to see the recent outpouring as well-wishers consider their legacies in government and global humanitarian work.