By Scott Malone BOSTON (Reuters) - Jury selection is set to begin on Monday in the trial of the man accused of carrying out the 2013 Boston Marathon bombing that killed three people and wounded more than 260 others in the largest mass-casualty attack on U.S. soil since Sept. 11, 2001. Dzhokhar Tsarnaev, a 21-year-old ethnic Chechen who is a naturalized U.S. citizen, could get the death penalty if convicted in federal court in Boston. He has pleaded not guilty to all 30 charges against him. ...