Finally tonight, america strong. and the generous gift from a stranger who simply answered a prayer request on facebook and in doing so saved a life. >> hey, heather! i'm doing good, i'm up! >> it's not even christmas yet, but roy mcintosh has already received his favorite gift, thanks to the generosity of a stranger. >> perfect stranger, perfect match, and a perfect god. >>this father of five didn't even realize that his wife -- out of desperation -— posted a prayer plea in a facebook group, writing, "please pray for my husband that god sends a type b+ living kidney donor to him. we believe...