This courtroom sketch depicts Boston Marathon bombing suspect Dzhokhar Tsarnaev standing with his lawyer Judy Clarke, left, before Magistrate Judge Marianne Bowler, right, during his arraignment in federal court Wednesday, July 10, 2013 in Boston. The 19-year-old has been charged with using a weapon of mass destruction, and could face the death penalty. (AP Photo/Jane Flavell Collins)

Boston bombing suspect pleads not guilty

His arm in a cast and his face swollen, a blase-looking Dzhokhar Tsarnaev pleaded not guilty Wednesday in the Boston Marathon bombing in a s…