 Complete the following phrase:  Giddys first national competition was the National Games in 1969, and his first international competition was the 1970 Commonwealth Paraplegic Games in Edinburgh, where he won three gold medals and a silver medal. At the 1972 Heidelberg Paralympics, he won a silver medal in the Mens 100 m Wheelchair 4 event, and also participated in the Australia mens national wheelchair basketball team. He participated in the 1974 Commonwealth Paraplegic Games in Dunedin, New Zealand. He was selected but did not participate in the 