Boston Marathon bombing

=== MIT shooting and carjacking ===
[[File:Scenes and approximate times of events of April 18-19.jpg|thumb|upright=1.8|left|Scenes and approximate times of events of April 18–19]]
Hours after the FBI released photos of the two suspects in the bombing, Tamerlan and Dzhokhar Tsarnaev visited their family's apartment in Cambridge. There, they obtained five improvised explosive devices (IEDs), ammunition, a semiautomatic handgun, and a machete. The two brothers then drove to the Massachusetts Institute of Technology.<ref name="auto1"/>

On April 18, 2013 at 10:25&nbsp;p.m., the Tsarnaev brothers ambushed and shot Sean A. Collier of the [[Massachusetts Institute of Technology Police Department]] six times.<ref name="admits" /><ref name="auto1"/> The two brothers were attempting to steal Collier's [[Smith & Wesson M&P|Smith & Wesson M&P45]] sidearm, which they could not free from his holster because of its security retention system.<ref>{{cite news|date=April 23, 2013|title=Police believe Tsarnaev brothers killed officer for his gun|work=CBS News|url=https://www.cbsnews.com/news/police-believe-tsarnaev-brothers-killed-officer-for-his-gun/|access-date=April 11, 2015}}</ref> Collier, aged 27, was seated in his police car near [[Ray and Maria Stata Center|Building 32]] on the Massachusetts Institute of Technology campus.<ref name="NY Times Standoff" /><ref name="lowery" /> He died shortly after the shooting.<ref name="NY Times Standoff" /><ref name="AutoLC-58" />

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 | image1 = RIP Officer Sean Collier (9887748094).jpg
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 | caption2 = Police officers carrying the coffin of Collier at an April 24 service
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 | caption3 = Vice President [[Joe Biden]] speaks with Governor Deval Patrick at the April 24 service for Collier
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The brothers then [[carjacked]] a [[Mercedes-Benz M-Class]] [[SUV]] in the [[Allston-Brighton]] neighborhood of Boston. Tamerlan took the owner, Chinese national Dun "Danny" Meng<ref>{{cite news|url=https://www.cbsnews.com/news/boston-marathon-bombing-jurors-see-dramatic-video-of-carjack-victims-escape/|title=Boston bombing jurors see dramatic video of carjack victim's escape|agency=CBS/[[Associated Press|AP]] | work=[[CBS News]] | date=March 12, 2015|access-date=March 12, 2015}}</ref> ({{zh|c=孟盾}}),<ref>Chinese name from: {{cite news|url=http://ny.uschinapress.com/weekends/2017/01-13/111620.html|title=《爱国者日》上映 再现波马爆炸案 留学生孟盾事迹搬...|newspaper=[[The China Press]]|date=January 13, 2017|access-date=September 22, 2018|archive-date=September 21, 2018|archive-url=https://web.archive.org/web/20180921191256/http://ny.uschinapress.com/weekends/2017/01-13/111620.html|url-status=dead}}</ref> hostage and told him that he was responsible for the Boston bombing and for shooting Collier.<ref name="NY Times Standoff" /> Dzhokhar followed them in their green [[Honda Civic]], later joining them in the Mercedes-Benz. Interrogation later revealed that the brothers "decided spontaneously" that they wanted to go to New York and bomb [[Times Square]].<ref name=Gorman />

The Tsarnaev brothers forced Meng to use his ATM cards to obtain $800 in cash (equivalent to ${{Inflation|US|800|2013|fmt=c}} in {{Inflation/year|US}}).<ref name="AutoLC-60" /><ref name="WashPost04192013" /> They transferred objects to the Mercedes-Benz and one brother followed it in their Civic,<ref name="wsjdetails" /> for which an [[all-points bulletin]] was issued. The Tsarnaev brothers then drove to a [[Shell Oil Company|Shell]] gas station on Memorial Drive in Cambridge to fill up for the long ride to Times Square to set off more explosives. But while Dzhokhar went inside to pay for junk food, Meng, fearing that the suspects would harm him during the long drive, escaped from the Mercedes and ran across the street to the [[Mobil]] gas station, asking the clerk to call 911.<ref name="AutoLC-62" /><ref name="AutoZ2-11" /> His cell phone remained in the vehicle, allowing the police to [[Mobile phone tracking|focus their search]] on Watertown.<ref name="cnnpol" />
<!-- Map hidden pending its updating to reflect the actual, correct locations of where things happened. Hijacking of SUV did not happen in East Cambridge. -->
<!-- {{Wide image|Boston marathon event map.png|900px|Map of events related to the Boston Marathon bombing (1) and subsequent manhunt (times approximate)<br />2) April 18, 10:30{{nbsp}}p.m. – MIT police officer Sean Collier shot and killed<br />3) April 18, 11:00{{nbsp}}p.m. – SUV hijacked<br />4) April 18, shortly thereafter – SUV driver escaped unharmed<br />5) April 18, 11:18{{nbsp}}p.m. – Surveillance photos identify brothers at an ATM<br />6) April 19, 1:00{{nbsp}}a.m. – Gunfire opens up on Laurel St. in Watertown between police and suspects. Tamerlan Tsarnaev is critically injured in the incident and later reported dead. Dzhokhar Tsarnaev escapes<br />7) April 19, 7:00{{nbsp}}p.m. – More gunfire breaks out in Watertown, on Franklin St.; Dzhokhar is found hiding in a stored boat and taken into custody around 8:45{{nbsp}}p.m. EDT}} -->