4 Years Later, Unresolved Questions About Boston Marathon Bombing

It’s been four years since brothers Tamerlan and Dzhokhar Tsarnaev bombed the Boston Marathon. Since then there have been a number of other terror attacks — in Paris, Manchester, Brussels and Paris again — where the attackers either used bombs similar to the ones used in Boston, or where the attackers were brothers.

So what have we learned from the marathon bombing? Here & Now‘s Robin Young talks with Meghna Chakrabarti (@MeghnaWBUR), who has been reporting on that question for her show, WBUR’s Radio Boston, with producer Jamie Bologna.

Copyright 2017 NPR. To see more, visit http://www.npr.org/.