Illinois is pretty much a "gun free" state. You can own guns here, you just can't carry them.
Of course you can. You just can't carry them concealed and/or loaded. They must be unloaded and in a proper carrying case. How else would hunters hunt?
But I'm sure you were referring to concealed carry. It's sad the state doesn't allow this. The wife and I agreed this a.m. that had one or more of the students/instructors been allowed to 'carry', the carnage may well have been far less.
BTW, one of my wife's employees is a teacher associate at NIU, and a friend of the instructor of the class. She related to my wife last night that the gunman chased her friend off the stage and shot him in the arm. He's going to be alright.