A federal court blocked Cody Wilson, a do-it-yourself gun proponent, from publishing the blueprints for 3-D-printed guns on his website. Wilson says the blueprints are protected free speech, and gun enthusiasts say bans on 3-D gun blueprints would do little to stop crime and be unenforceable. A coalition of state attorneys general is fighting to keep publishing the blueprints illegal, arguing that these instructions would dramatically increase gun violence by making 3-D printed weapons easy for criminals and terrorists to obtain.