Melvin Croft has over thirty years of experience as a geologist and is a member of the organization collectSpace, which is dedicated to educating the public about historical and current space exploration. He is a contributor to Footprints in the Dust: The Epic Voyages of Apollo, 1969–1975 (Nebraska, 2010). John Youskauskas is a captain for a major fractional business jet operator. He has also served as an aviation safety board member and has contributed to a number of aviation safety publications. He is a contributor to Footprints in the Dust: The Epic Voyages of Apollo, 1969–1975 (Nebraska, 2010) and to Fallen Astronauts: Heroes Who Died Reaching for the Moon (Nebraska, 2016).¿Don Thomas is a former NASA mission specialist and the author of Orbit of Discovery: The All-Ohio Space Shuttle Mission. ¿