Meet Benjaman Kyle: The Man With No Identity

"Imagine for a moment that from this day forward you will have no memory of who you are, where you're from or the identities of any of your loved ones. It's a scary thing to contemplate, but for one man in Savannah, Ga., that harsh scenario is all too real.

Meet Benjaman Kyle, a 60-something man who can remember what he had for dinner last week but has no recollection of his parents or the high school from which he presumably graduated.

"It's like having something on the tip of your tongue...