July 30, 2018 5:09 am Pennsylvania Fights to Block 3D Printer Guns Anyone with a 3D printer can buy a set of instructions to create a gun. Pennsylvania has filed a permanent injunction to stop the weapons from being sold. US & World Videos 2:54 UPenn leaders reiterate to pro-Palestinian protesters that they need to disband 1:44 Pro-Palestinian protesters remain on UPenn's campus despite warnings to disband 1:30 Protests calling for ceasefire continue at Penn 6:33 Family affair: Former Eagle and new Eagle Jeremiah Trotter and Jeremiah Trotter Jr. speak out 0:20 Teen girl shot in Southwest Philly, suspect in custody