Misc: which member of 'the oak ridge boys' is a former radio disc jockey?

Questions

In 1947 Chuck ---------- pilots the world's first supersonic flight (Mach 1.015 at 12,800 m) at Muroc, CA. ?

In 1949 ---------- US Communist Party leaders convicted of sedition. ?

In 1949 14 US Communist Party leaders convicted of---------- . ?

In 1965 ---------- Engle in X-15 reaches 80 km. ?

In 1965 Joe ---------- in X-15 reaches 80 km. ?