Boston Marathon Bombing - CBS News Ten weeks before the Boston Marathon bombings, Tamerlan Tsarnaev bought two mortar kits from a New Hampshire fireworks store; Also, the Associated Press suspended its twitter account after it was hacked Tuesday. A group called syrian electronic army claimed responsibility for sending a tweet that read: "Breaking.... Two explosions in the White House and Barack Obama is injured"; And, team of 16 volunteer doctors provide free medical care to homeless women in Boston.