they include `` envisioning america : prints , drawings and photography by georg grosz and his contemporaries , '' featuring german expressionist views of america -lrb- april 19-june 24 -rrb- ; `` thomas hart benton : an american original , '' a retrospective of 81 paintings by the american regionalist -lrb- april 29-july 22 -rrb- and `` the new vision , '' 125 innovative works by 70 modernist photographers -lrb- may 10-july 15 -rrb- .