Reporting for the AP, Denise Lavoie writes:
Tsarnaev, flanked by his attorneys, sat at a table at the front of the jury assembly room. Wearing a dark sweater and khaki pants, he looked down much of the time but occasionally glanced at the potential jurors and the judge. He also picked at his shaggy beard.
When U.S. District Judge George O'Toole Jr. introduced him to the first group of prospective jurors and asked him to stand, he acknowledged them with a slight nod.
Over the next three days, a larger-than-normal pool of about 1,200 people will be summoned to federal court to be considered as potential jurors.
The first two groups of 200 people each were given initial instructions Monday by O'Toole and then began filling out long questionnaires.
Twelve jurors and six alternates will ultimately be selected. The judge said testimony in the trial will begin on Jan. 26 and last three to four months.