In late 1934, the Tizard Committee asked radio expert Robert Watson-Watt to comment on the repeated claims of radio death rays and reports suggesting Germany had built some sort of radio weapon. His assistant, Arnold Wilkins, demonstrated that a death ray was impossible but suggested radio could be used for long-range detection. In February 1935, a demonstration was arranged by placing a receiver near a BBC shortwave transmitter and flying an aircraft around the area; an oscilloscope connected to the receiver showed a pattern from the aircraft's reflection.