On Dec. 19, 2018, Jennifer Kunz, deputy program manager for Exploration Ground Systems, speaks during a groundbreaking ceremony for a new liquid hydrogen tank for Launch Complex 39B at the agency's Kennedy Space Center. The storage facility will hold 1.25 million gallons of the propellant for NASA's Space Launch System rocket designed to boost the agency's Orion spacecraft, sending humans to distant destinations such as the Moon and Mars.