GAITHERSBURG – More than 300 people gathered at Shaare Torah Congregation last Wednesday for a screening of “Blue Tattoo,” a documentary film chronicling the experiences of Dina Jacobson – mother of Connie Liss, the congregation’s executive board president – during and after the Holocaust. The title of the film is taken from a song by Ithaca, N.Y. folksinger Joe Crookston. After meeting Jacobson Crookston composed the song, which is written from Jacobson’s perspective as she explains the blue inmate number tattooed on her arm to her young daughter. The song plays throughout the documentary, which recounts Jacobson’s experiences at the Auschwitz concentration camp. The documentary also tells the story of Jacobson meeting her husband, a survivor of a different camp, after the war and their eventual settling in Elmira, N.Y., where Jacobson frequently spoke about her experiences. The screening marked Yom Hashoah, or Holocaust Remembrance Day. Following the screening, congregation members had a Q-and-A session and prayers in memory of all of the victims of the Holocaust.