principle, compulsory. Prospective jurors are sent a summons and are obligated to appear in a specified jury pool room on a specified date. However, jurors can be released from the pool for several reasons including illness, prior commitments that cannot be abandoned without hardship, change of address to outside the court's jurisdiction, travel or employment outside the jurisdiction at the time of duty, and others. Often jurisdictions pay token amounts for jury duty and many issue stipends to cover transportation expenses for jurors. Work places cannot penalize employees who serve jury duty. Payments to jurors varies by jurisdiction. In the United States jurors for grand juries are selected from jury pools. Selection of jurors from a jury pool occurs when a trial is announced and juror names are randomly selected and called out by the jury pool clerk. Depending on the type of trial—whether a 6-person or 12 person jury is needed, in the United States—anywhere from 15 to 30 prospective jurors are sent to the courtroom to participate in voir dire, pronounced in French, and defined as the oath to speak the truth in the examination testing competence of a juror, or in another application, a witness. Once the list of prospective jurors has assembled in the courtroom the court clerk assigns them seats in the order their names were originally drawn. At this point the judge often will ask each prospective juror to answer a list of general questions such as name, occupation, education, family relationships, time conflicts for the anticipated length of the trial. The list is usually written up and clearly visible to assist nervous prospective jurors and may include several questions uniquely pertinent to the particular trial. These questions are to familiarize the judge and attorneys with the jurors and glean biases, experiences, or relationships that could jeopardize the proper course of the trial. After each prospective juror has answered the general slate of questions the attorneys may ask follow-up questions of some or all prospective jurors. Each side in the trial is allotted a certain number of challenges to remove prospective jurors from consideration. Some challenges are issued during voir dire while others are presented to the judge at the end of voir dire. The judge calls out the names of the anonymously challenged prospective jurors and those return to the pool for consideration in other trials. A jury is formed, then, of the