The nation in brief

Posted: August 22, 2014 at 4:05 a.m.

A police officer and his canine partner patrol outside federal court in Boston, Thursday, Aug. 21, 2014. A college friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev pleaded guilty Thursday of impeding the investigation into the deadly attack. Dias Kadyrbayev, 20, is accused of removing a backpack containing emptied-out fireworks from Tsarnaev's dorm room after realizing he was suspected of carrying out the 2013 attack with his brother, Tamerlan Tsarnaev. (AP Photo/Elise Amendola)

Tsarnaev friend admits taking evidence

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