During World War II, the Germans had at least two projects, and the Japanese one, to create so-called death rays. One German project led by Ernst Schiebold concerned a particle accelerator with a steerable bundle of beryllium rods running through the vertical axis. The other was developed by Dr. Rolf Widerøe and is referred to in his biography. The machine developed by Widerøe was in the Dresden Plasma Physics laboratory in February 1945 when the city was bombed. Widerøe led a team in March 1945 to remove the device from the ruined laboratory and deliver it to General Patton's 3rd Army at Burggrub where it was taken into US custody on 14 April 1945. The Japanese weapon was called Death ray "Ku-Go" which aimed to employ microwaves created in a large magnetron.