Inquirer Photo Mayor Nutter this morning said the National Rifle Association owed an apology to the family of slain police officer Sgt. Stephen Liczbinski. Nutter recently signed five local gun bills into law, including one that would outlaw the possession and sale of certain assault weapons. The NRA immediately sued the city on the grounds that the city does not have the authority to enact local gun control. They obtained a temporary restraining order to keep the city from enforcing the new laws. Liczbinski was killed with a Chinese-made assault weapon. "I think it's insane," Nutter said. "The fact that...