renee joined them for rhonda's birthday and the christ yes's 38th wedding anniversary. an amazing reunion. "dateline" was happy to broadcast it around the country on march 25, 2011. no idea that something quite unbelievable would happen. because one of the people who tuned in that night was a woman named geri. and oh, what a story she had to tell. >> it was a story two sisters waited a very long time to hear. coming up -- >> 99.99% probability. that means it's confirmed. >> when "dateline" continues. ♪ protect your pet with the #1 name in flea and tick protection. frontline plus. trusted by vets for nearly 20 years.