Jim Gillâ??s portrait photographs of Vietnam War veterans are large-scale, arresting and full of harrowing humanity. To confront these images is to come face-to-face with men and women whoâ??ve seen and experienced things most people can only imagine. Nearly 30 of Gillâ??s portraits are on display until Jan. 3 in the exhibition â??Back in the World: Portraits of Wisconsin Vietnam Veteransâ? at UW-Madisonâ??s Chazen Museum of Art.