Sen. Elizabeth Warren, D-Mass., at memorial for fallen MIT officer: '1 year ago cowards set off bombs at our beloved marathon, trying to scare us...But we were fearless. We did not waver' - @WesleyLowery
Tamerlan Tsarnaev, 26, and his 19-year-old brother, Dzhokhar Tsarnaev, are accused of setting off the two bombs near the finish line of the Boston Marathon on April 15, 2013, that killed three people and wounding more than 180 others.
Three days later, investigators say they killed a university police officer, carjacked a man and led police on a chase that resulted in a shootout that left Tamerlan Tsarnaev dead. His younger brother escaped, but was captured the next day, alive but badly wounded. - AP