Pete Hasbrook, manager of the International Space Station Program Science 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, July 24, 2019, at the agency’s Kennedy Space Center in Florida. 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.