On the morning of Oct. 27, 2018, a gunman walked into the Tree of Life synagogue in Pittsburgh and killed 11 people who had gathered to worship, the deadliest antisemitic attack in the nation’s history. After weeks of jury selection, opening statements are scheduled to begin on Tuesday in the federal trial of the man accused of carrying out the massacre. Prosecutors are seeking the death penalty and the next phase of trial will take place in two parts, the first concerning guilt and the second on the penalty. As the facts surrounding the shooting are mostly undisputed, the proceedings...