My Facebook comment was, "Of course you can. You just can't get to the GATES without an ID, boarding pass and TSA screening." Everyone has experienced going to airports - pretty much anywhere in the US to pick someone up or to catch a flight. You walk into the airport from the outside world - whether you walk, bike, take a taxi, arrive by bus, or drive your own car and park - and there are no restrictions to entering the airport. It's only when you want to get to the gates that the restrictions begin.
Here's a response from Drew Hanson, who entered the Capitol today:
I got into the Cap this morning because I had the printout in hand for a public hearing on some DNR rules. But that doesn't mean it was easy. I was questioned by armed police no less than six times, searched and then escorted to and from the hearing by armed police. When I needed to leave the hearing to use the restroom, two armed police stood outside the door. When I asked if I could stretch my legs after sitting through an hour of hearing testimony, I was directed to walk back and forth between two armed police who could keep an eye on me. It was far more intrusive and far more threatening than anything I have ever encountered in any airport. I cannot believe this is happening in the United States of America. This is not the way law abiding citizens should be treated in this country.