During 1944 he rescued a large number (1,200) of Jews from the concentration camp Theresienstadt with his father. He also received one of the first Swiss parachute jumper licenses in 1947.
In 1944, he rescued a significant number (1,200) of Jews from the Theresienstadt concentration camp alongside his father.  He also received one of the initial Swiss parachute jumping licenses in 1947.