[ stop the slideshow ]

17-Michael Papka and students at Argonne National Lab-0718-DG-038

17-Michael Papka and students at Argonne National Lab-0718-DG-038.JPG 17-Michael Papka and students at Argonne National Lab-0718-DG-037Thumbnails17-Michael Papka and students at Argonne National Lab-0718-DG-03917-Michael Papka and students at Argonne National Lab-0718-DG-037Thumbnails17-Michael Papka and students at Argonne National Lab-0718-DG-03917-Michael Papka and students at Argonne National Lab-0718-DG-037Thumbnails17-Michael Papka and students at Argonne National Lab-0718-DG-03917-Michael Papka and students at Argonne National Lab-0718-DG-037Thumbnails17-Michael Papka and students at Argonne National Lab-0718-DG-03917-Michael Papka and students at Argonne National Lab-0718-DG-037Thumbnails17-Michael Papka and students at Argonne National Lab-0718-DG-039