Add to ORKGPhotograph of Jill Kleister, (left) Graduate Reader at University of North Texas and Warren Burggren (right) Professor at the Department of Biological Sciences. Kleister and Burggren are attending the Open Access Symposium hosted and held at UNT's Union Building. The theme of the conferences is Open Access at the Tipping Point. Kleister and Burggren are seated in among a crowd of other conference attendees, talking to one another