Code Is Free Speech, a coalition of five U.S. groups, said the ban on publishing blueprints for 3D guns violates the First Amendment. A coalition of gun rights advocates challenged a federal judge's order temporarily barring a Texas company from publishing blueprints on the web to make untraceable 3D-printed guns by publishing similar blueprints itself on Tuesday, saying such publications were protected by the First Amendment. After years of litigation, U.S. District Judge Robert Lasnik issued a temporary restraining order earlier in the day blocking Defense Distributed of Austin, Texas, from relaunching on Wednesday with blueprints for plastic firearms that...