>> reporter: through this number she discovered menachem is from hungary and did he have a brother, an identical twin named yeno, last seen lie allied doctors in auschwitz. >> we know that he was declared healthy. on the 9th of february, 1945 by a medical staff, there was -- this is really the last. >> reporter: together they set up facebook page a-7734 now viewed more than a million times. each time the page is shared, they hope it will bring them one step closer to finding yeno. but menachem knows even if he finds yeno, it may be too late. he says, "i closed a circle. it is just good to know that what i was dreaming was real and not my imagination." menachem is still searching for his twin brother, but along the way he he has also found