Boston bombing: Tsarnaev case jury pool 'unusually large'

Jury selection has begun in the US trial of Boston Marathon bombing suspect Dzhokhar Tsarnaev, who is accused of killing three people and injuring more than 260 in April 2013.

Mr Tsarnaev faces the possibility of the death penalty if he is convicted of detonating a pair of homemade bombs.

Barbara Plett reports.