Mike Roberts, deputy chief scientist for the ISS Program at NASA’s Johnson Space Center in Houston, talks to NASA Social participants during a What’s On Board science briefing at the agency’s Kennedy Space Center in Florida on April 29, 2019. The briefing was held for SpaceX’s 17th Commercial Resupply Services (CRS-17) mission to the International Space Station. NASA’s Orbiting Carbon Observatory-3 (OCO-3) and Space Test Program-Houston 6 (STP-H6) are two of the experiments that will be delivered to the space station on CRS-17. The SpaceX Falcon 9 rocket and Dragon cargo module are scheduled to launch no earlier than May 3, 2019, from Space Launch Complex 40 on Cape Canaveral Air Force Station in Florida.