Jackson Pollock’s "Mural" (1943) is a monumental eight-by-twenty foot work that marks a turning point in the artist’s career and the course of American art. In 2012, "Mural" traveled to the Getty for conservation, cleaning, and study, which revealed groundbreaking information about the work and its creator. In the first half of a two-part conversation, Laura Rivers and Yvonne Szafran, conservators at the J. Paul Getty Museum, Alan Phenix and Tom Learner, scientists at the Getty Conservation Institute, and Andrew Perchuk, deputy director at the Getty Research Institute, tell the story of this important work.