Boston Marathon explosions
Commissioner Ed Davis acknowledged that police might not have uncovered or disrupted a plot even if they had fully investigated the family of Tamerlan Tsarnaev based on Russia's warnings.
The U.S. Marshals Service said Friday that Dzhokhar Tsarnaev left Beth Israel Deaconess Medical Center overnight and was taken to the Federal Medical Center Devens about 40 miles west of Boston.
U.S. investigators hope to gain more information through contact with the parents of Dzhokhar and Tamerlan Tsarnaev in Russia.
This is a recap of the 2013 Boston Marathon bombings, on April 15, and the five days that followed, through bombing suspect Dzhokhar Tsarnaev's capture.
Everyone played a part, from doctors, nurses and paramedics to strangers who took off belts to use as tourniquets and staunched bleeding with their bare hands. As of Monday, 51 people remained hospitalized, three of them in critical condition and five listed as serious.
Boston Police Commissioner Ed Davis told CBS' "Face the Nation" that authorities found an arsenal of homemade explosives after a gun battle between police and the suspects in the Boston suburb of Watertown early Friday.
There was no immediate word on when Dzhokhar Tsarnaev might be charged and what those charges would be.
Even in the chaos of tragedies such as the Boston Marathon bombings, our collective human spirit provides reason for hope.
Two suspects in the Boston bombings were identified to The Associated Press as coming from the Russian region near Chechnya, but there was no immediate information of their links, if any, to any insurgent group.
Like numerous disasters before, hoaxes and conspiracies have popped up in the chaotic first days after the tragedy, days when people want to jump in with help and support while investigations have barely begun or level of help for victims identified.
People take turns volunteering at the barricade on Boylston Street. But Ed Starbuck is perhaps the most faithful, arriving home at 2 a.m. Thursday, then turning around and coming back on the morning bus that arrived just before noon.
The burst of activity came at the end of a tense day in and around Boston, and less than an hour after police announced that they were scaling back the hunt because they had come up empty-handed following an all-day search that sent thousands of SWAT team officers into the streets and paralyzed the metropolitan area.
Earlier, at an interfaith service honoring the victims, President Barack Obama sought to inspire a stricken city and comfort an unnerved nation, declaring that Boston "will run again."
Three Columbia residents and an MU alumna who ran in the Boston Marathon were trying to figure out their next move following Monday's tragedy.
Steve Swope writes that physical and emotional wounds will not be erased by attempts at justice, and he encourages us not to give into hatred.
The FBI and other law enforcement agencies repeatedly pleaded for members of the public to come forward with photos, videos or anything suspicious they might have seen or heard.
Three people died, and more than 170 others suffered injuries that included severed limbs, shrapnel wounds, broken bones and head trauma.
The boy's mother and sister were badly injured in the blast.
St. Louis Police Chief Sam Dotson said it is too soon to say if the events in Boston will result in greater security at public events in St. Louis.
"We will find out who did this. We'll find out why they did this," President Barack Obama said.