White House Office of Science and Technology Policy Director Kelvin Droegemeier visits the roof of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on July 10, 2019. In the background is Launch Complex 39B, where the mobile launcher is undergoing testing in preparation for launch of the agency’s Space Launch System rocket for the first Artemis mission. Droegemeier visited the iconic rocket-assembly facility in the heart of Kennedy’s Launch Complex 39 Area during a tour of the multi-user spaceport.