An unusual mission for the RFC was the delivery of spies behind enemy lines. The first mission took place on the morning of 13 September 1915 and was not a success. The plane crashed, the pilot and spy were badly injured and they were both captured (two years later the pilot, Captain T.W. Mulcahy-Morgan escaped and returned to England). Later missions were more successful. In addition to delivering the spies the RFC was also responsible for keeping them supplied with the carrier pigeons that were used to send reports back to base. In 1916 a Special Duty Flight was formed as part of the Headquarters Wing to handle these and other unusual assignments.