Marlene Paul, left, ART 180’s co-founder and executive director, greets Melody Barnes, former White House domestic policy adviser, and her husband, Marlon Buckner Jr., at the opening of ART180's 20th anniversary exhibit last Friday at the organization’s Atlas Galley, 114 W. Marshall St. Work from the exhibit, titled “Twenty: ART 180 Takes the Bus,” will spend most of August touring the city on GRTC buses.