All advance tickets for this program have been claimed. Don’t worry! We always save a select number of seats for walk-ups, on a first-come, first served basis. Questions? Email Hirshhornexperience@si.edu Join artist Inge Mahn and Hirshhorn Curator-at-Large Gianni Jetzer for a close look at Schulklasse  (1970), a recent Museum acquisition and the newest addition to the exhibition What Absence