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Dzhokhar Tsarnaev

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The attorney for Dias Kadyrbayev, a college friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev, announced that his client has changed his plea to guilty to impeding the investigation into the deadly attack

The attorney for Dias Kadyrbayev, a college friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev, announced that his client has changed his plea to guilty to impeding the investigation into the deadly attack. Kadyrbayev removed a backpack containing emptied-out fireworks from Tsarnaev's dorm room after realizing that Tsarnaev was a suspect in the marathon bombing.

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One year after the Boston Marathon bombing took the lives of 3 people and injured hundreds of others, a wreath laying ceremony was held in remembrance of those who died

One year after the Boston Marathon bombing took the lives of 3 people and injured hundreds of others, a wreath laying ceremony was held in remembrance of those who died. The ceremony was attended by the families of the three bombing victims as well as relatives of a Massachusetts Institute of Technology police officer killed in the blasts' aftermath.

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A government reports says Russia refused to give the FBI crucial information about Tamerlan Tsarnaev, a Boston marathon bombing suspect

A government reports says Russia refused to give the FBI crucial information about Tamerlan Tsarnaev, a Boston marathon bombing suspect. The Russians did not reveal at the time Tsarnaev talked about Jihad with his family. CBS News national security analyst Juan Zarate discusses if disclosing the information could have prevented the bombing with the "CBS This Morning" co-hosts.

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