One by one, they swore to tell the truth. One by one, they sat in a witness chair and told a similar tale of suggestion, persuasion and pressure. During the first day Friday of what is expected to be a two-day tribunal, former and current teachers at Atlanta's Usher Elementary School pointed a collective finger of blame at Donald Bullock Friday as the mastermind behind test cheating at that school. Bullock's attorney, Daniel Digby, said his client did nothing wrong. Atlanta Public Schools, however, laid out a 16-point letter of charges against Bullock, who served as testing coordinator at Usher...