The Boston bombers were reported to have used an Internet site that hosted the Al-Qaeda terrorist training manual Inspire to build the pressure cooker bombs. It is illegal to train or give instructions on how to make weapons of mass destruction per 842(p):
http://www.law.cornell.edu/uscode/text/18/842
Our government can shutdown Internet sites that host and share copyrighted material like music & movies as well as 3D printer gun designs, yet Inspire is left alone and available?!?
Apply the same ferocity you applied to attempting to add legislature for gun control, shutting down file sharing sites, and 3D printer gun designs to shutting down terrorist sites!!!