Lead prosecutor William Weinreb delivers opening statements Wednesday at the Moakley U.S. Courthouse while 21-year-old Dzhokhar Tsarnaev sits between his attorneys. Tsarnaev could be sentenced to death if convicted.

JANE FLAVELL COLLINS—AP

Lead prosecutor William Weinreb delivers opening statements Wednesday at the Moakley U.S. Courthouse while 21-year-old Dzhokhar Tsarnaev sits between his attorneys. Tsarnaev could be sentenced to death if convicted. JANE FLAVELL COLLINS—AP