when the red army started closing on auschwitz in january 1945, the remaining prisoners were transferred on foot to germany. after a three-day long death march the survivors, including klieger, were sent to the mittelbau-dora concentration camp. there he succeeded in fooling the germans for the second time by pretending to be a precision mechanics expert and was sent to the underground plant producing missiles. on april 4 he was once again sent by foot with the rest of the prisoners to another concentration camp, this time ravensbruck. this death march took 10 days, but on april 29 klieger and other ravensbruck prisoners were freed by the red army.