Thalia Patrinos, and Jason Townsend from NASA's Social Media Teamm monitor questions coming in from social media during an event where nine U.S. companies where named as eligible to bid on NASA delivery services to the lunar surface through Commercial Lunar Payload Services (CLPS) contracts, Thursday, Nov. 29, 2018 at NASA Headquarters in Washington. The companies will be able to bid on delivering science and technology payloads for NASA, including payload integration and operations, launching from Earth and landing on the surface of the Moon. NASA expects to be one of many customers that will use these commercial landing services. Photo Credit: (NASA/Bill Ingalls)