Graffiti is not new to Portland. The term can include everything from a simple tag or initials to artistic murals on building walls. Whether it's words or pictures, graffiti has a documented history in the city that dates back to the late 1940s. As businesses deal with defaced property and unpermitted art, the city is moving on plans to expand deployment of contracted cleaners. But some advocates are looking to a different answer: a free wall. This would be a designated space for artists to gather, create and share ideas. As a part of our series on graffiti, we hear from Tiffany Conklin, the executive director of Portland Street Art Alliance. She joins us to share what a free wall would mean in Portland and the history of street art in the city.