Lawyers for Boston Marathon bombing suspect Dzhokhar Tsarnaev have asked a judge to make prosecutors turn over family-related evidence as they try to build a case that his older brother was the “main instigator” of the deadly attack.

The Boston Marathon bombings could have been prevented if US officials had followed through on Russian intelligence, a senior Moscow official has said.

IN Louisville, Kentucky last Friday morning, four Pakistani-American doctors dressed in business suits and medical scrubs sat in one of this city’s most popular breakfast spots and fretted.

Boston Marathon bombing suspect Dzhokhar Tsarnaev was still in hospital this morning, in a serious condition and under heavy guard.