Six years ago, as congregants prayed at the Tree of Life Synagogue in Pittsburgh on a quiet Shabbat morning, a gunman armed with an AR-15, multiple handguns, and hate in his heart, opened fire and killed 11 Jewish worshippers and wounded six more, in the deadliest act of Antisemitism in our history. It shattered families, pierced the heart of the Jewish community, and struck the soul of our nation.