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Suspect dead, another at large after police chase

An armored vehicle sped through Watertown after an MIT police officer was shot and killed, and an armed carjacking led police on a frenetic chase into Watertown.

Essdras M. Suarez/Globe Staff

An armored vehicle sped through Watertown after an MIT police officer was shot and killed, and an armed carjacking led police on a frenetic chase into Watertown.

Police officers searched for a suspect in Watertown. they are warning residents to not leave their homes.

Matt Rourke/ AP

Police searched Watertown for the "white hat" suspect in the Marathon bombing. They are warning residents not to leave their homes.

According to police, the

FBI

According to police, the "white hat" suspect from the Marathon bombings is still at large. Here is a closeup of him and a photo of him with the "black hat" suspect at the Marathon.

A convenience store at Memorial Drive and River Street in Cambridge became a crime scene after two men carjacked an SUV at gunpoint.

David L. Ryan/ Globe Staff

A convenience store at Memorial Drive and River Street in Cambridge became a crime scene after two men carjacked an SUV at gunpoint.

The events began with a reported shooting at the intersection of Vassar Street and Main Street in Cambridge.

Aram Boghosian for The Boston Globe

The events began with a reported shooting at the intersection of Vassar Street and Main Street in Cambridge.

Police on scene after a reported shootout on Mt. Auburn Street in Cambridge.

Aram Boghosian for The Boston Globe

Police were on the scene after a reported shootout on Mt. Auburn Street in Cambridge.

Police used a K9 unit to search nearby train tracks in Cambridge.

Aram Boghosian for The Boston Globe

Police used a K9 unit to search nearby train tracks in Cambridge.

A police chase after an apparent carjacking led to Watertown, where a firefight ensued.

Mario Tama

A police chase after an apparent carjacking led to Watertown, where a firefight ensued.

Heavily armed officers arrived in Watertown.

Craig Ruttle/ AP

Heavily armed officers arrived in Watertown.

Police secured the area.

Essdras M. Suarez/Globe Staff

Police secured the area in Watertown.

Police secured the area in Watertown and told residents not to come out of their homes.

Essdras M. Suarez/Globe Staff

Police told residents not to come out of their homes in Watertown.

The FBI Thursday released photos and video of two suspects in the deadly Boston Marathon bombings, appealing to the public to help find them.

FBI

The FBI Thursday released photos and video of two suspects in the deadly Boston Marathon bombings, appealing to the public to help find them.

Marathon Bombings

Manhunt underway in Watertown

Police are searching a 20-block area for the “white hat” suspect in the Marathon bombings after a wild night that included a shootout and police chase that left one officer dead.

Kevin Cullen

//c.o0bg.com/rf/image_90x90/Boston/2011-2020/2013/04/19/BostonGlobe.com/Metro/Images/Kevin_Cullen_150px-4702--90x90.jpg Coming face to face with them

Upon seeing photos of the Marathon bombing suspects, Bostonians thought of the victims, not vengeance. That’s how we honor Martin and Krystle and Lingzi.

Flowers, medals, stuffed animals, cards, flags, and hats pack a makeshift memorial at the corner of Boylston and Berkeley streets for the victims of the Marathon bombings.

Mourners turn street corner into makeshift memorial

The intersection of Boylston and Berkeley streets in Boston has become the unofficial people’s tribute to the three dead and more than 170 injured.

Opinion on the bombings

Derrick Z. Jackson

President Obama listened to remarks from Mark Barden, left, whose child was murdered at Sandy Hook Elementary School, alongside other victims of gun violence, following a Senate vote on background checks for firearm sales Wednesday.

Tough on violence?

As Democrats and Republicans praised the courage of first responders and citizens who comforted victims in Boston, a bipartisan Senate gun-control compromise was killed in the Senate.

Business

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The Moody School in Haverhill is using robots to work with students, including Tobi Adebayo.

Students seek connection with robots

Two robots — “Chip” and “Connor” — were donated to the Moody School in Haverhill as a way to teach social skills to autistic preschoolers.

Movies

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MOVIE REVIEW

Tom Cruise plays Jack Harper, a man assigned to keep watch over what's left of Earth.

Cruise-ing into 'Oblivion'

“Oblivion” is a lot like its star, Tom Cruise: clean, cold, efficient, increasingly overblown, and not a little inexplicable.