menachem began to wonder if his memories were simply dreams.ar he started the search again with a genealogist. he showed her two photos including a family photo that was in his pocket the day auschwitz was liberated. she took one look and knew it was not his. there was no brother in the photo. at first, menachem was crushed. one of the few clues he had was a false start. by she reminded him he had another lead. one he would never forget. the numbers are faded but the auschwitz i.d. tattooed on his arm is still visible. >> 87733. you're looking for -- "34." >> 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 menache