Jennifer Buchli, deputy chief scientist for NASA’s International Space Station Program, participates in a prelaunch news conference for SpaceX’s 20th Commercial Resupply Services (CRS-20) mission to the International Space Station at the agency’s Kennedy Space Center in Florida on March 6, 2020. The company’s Falcon 9 rocket and cargo Dragon spacecraft are scheduled to lift off from Cape Canaveral Air Force Station’s Space Launch Complex 40 at 11:50 p.m. EST on March 6, 2020.