Subscribe to Breaking News emailsYou have successfully subscribed to the Breaking News email.Subscribe today to be the first to to know about breaking news and special reports.In FocusFive days in April: The Boston Marathon bombing and the manhunt that followedBombs bloodied the finish line of the Boston Marathon on April 15, 2013, killing three spectators, and wounding 260 others. A bomb explodes in the crowd as runners cross the finish line during the 117th Boston Marathon. — Tom Green / Zuma PressSharePolice officers with their guns drawn react to a second explosion down the street.The first explosion knocked down the runner at the finish line. — John Tlumacki / Boston Globe/Getty ImagesShareBystanders help 17-year-old Sydney Corcoran at the scene of the first explosion on Boylston Street near the finish line.She survived the blasts.— John Tlumacki / The Boston Globe via Getty ImagesShareAn emergency responder and volunteers, including Carlos Arredondo in the cowboy hat, push Jeff Bauman in a wheelchair after the explosion near the finish line. Bauman lost both his legs in the explosion. His story was told in the 2017 film “Stronger,” starring Jake Gyllenhaal. — Charles Krupa / APShareHomemade bombAn investigator holds the remains of a pressure cooker, used to make a bomb, found at the scene. — Reuters / ReutersShareThe unfinished meals of fleeing customers are left on tables at an outdoor restaurant the day after the bombing. — Spencer Platt / Getty ImagesShareA Boston Police officer lifts the tape for a family to leave flowers in front of the home of the Richard family whose eight-year-old son, Martin, was killed in the blasts.— Jared Wickerham / Getty ImagesShareInvestigators work at the scene of one of the blast sites. — Julio Cortez / APShareApril 18: Suspects revealedTamerlan Tsarnaev, in black baseball hat, and his brother Dzhokhar, in a white hat, stand near the finish line of the Boston Marathon 10-20 minutes before the first blast. Investigators released photographs and video of two suspects and asked for the public’s help in identifying them on April 18, three days after the blasts. Later that night, Massachusetts Institute of Technology police officer Sean Collier was shot to death in his cruiser, allegedly by the Tsarnaev brothers. — Bob Leonard / APShareApril 19: ShootoutOfficials secure an area in Watertown, Massachusetts, after the Tsarnaevs had an early-morning gun battle with police. Tamerlan was run over by his brother in the shootout and died. Dzhokhar escaped, and around 6 a.m., authorities told residents of Boston and surrounding communities to stay indoors. All mass transit was shut down.— Julio Cortez / APShareManhuntA police officer evacuates a shoeless man holding a child as members of law enforcement conduct a search for Tsarnaev on April 19 in Watertown. — Matt Rourke / APShareSWAT teams enter a suburban neighborhood in Watertown. — Jessica Rinaldi / ReutersShareA woman carries a girl from their home as a SWAT team searches for Tsarnaev in Watertown. — Charles Krupa / APShareHideoutAn aerial infrared image shows the outline of Dzhokhar Tsarnaev in a boat in the backyard of a home in Watertown.A telephone call from a resident led police to the boat where Tsarnaev was hiding and a police helicopter detected a heat signal that confirmed his presence there. — Massachusetts State Police via ReutersShareCapturedDzhokhar Tsarnaev, a 19-year-old college student, lifts his shirt while standing in a boat at the time of his capture by law enforcement authorities in Watertown. — Sean Murphy / Massachusetts State Police via APShareA police officer in Boston reacts to the news that Tsarnaev had been arrested. Tsarnaev was sentenced to death on May 15, 2015. The case is likely to go through years of appeals. He is being held at the Supermax prison in Florence, Colorado.— Julio Cortez / APShareKrystle Campbell, 29, Martin Richard, 8, and Lu Lingzi, 23, were killed in the explosions at the Boston Marathon. Sean Collier, 26, an MIT campus police officer, was fatally shot by the Tsarnaev brothers in his patrol car two days after the bombings. — ShareHave feedback?How likely are you to recommend nbcnews.com to a friend or colleague?0 = Very unlikely10 = Very likelyPlease select answerIs your feedback about:ContentDesignOtherPlease select answerLeave your email if you’d like us to respond. (Optional)Please enter a valid email addressThank you!Your feedback has been sent out. Please enjoy more of our content.We appreciate your help making nbcnews.com a better place.