Bill Spetch, deputy manager of the International Space Station Transportation Integration Office at NASA’s Johnson Space Center in Houston, speaks during the prelaunch news conference for SpaceX’s 18th Commercial Resupply Services (CRS-18) mission to the station on July 24, 2019, at the agency’s Kennedy Space Center in Florida. At right is Jessica Jensen, director of Dragon mission management at SpaceX. The SpaceX Falcon 9 rocket and uncrewed Dragon spacecraft are scheduled to launch July 24, 2019, from Space Launch Complex 40 at Florida’s Cape Canaveral Air Force Station.