On Saturday, families of those killed in the 2013 Boston Marathon bombing gathered to commemorate the 10th anniversary of the tragedy. Led by a bagpiper, they walked to the memorial sites near the finish line and laid wreaths in silence. Rick DesLauriers, who was leading the FBI's manhunt for the suspected bombers, reflected on the tragedy and the bravery and resilience of the victims and their families. The FBI's investigation ultimately identified, located and apprehended the terrorists.