 Complete the following phrase:  Koch was initially sent to England for training and assessment, where he flew the Avro 504, the Armstrong Whitworth Siskin, and the Bristol Fighter. He then accepted a posting to the Middle East, and was attached to No. 208 Army Cooperation Squadron, RAF, at Heliopolis, Egypt. There he was operational on the Bristol Fighter, and in August and September 1929 was involved in the suppression of the 