From left, Moe Khaleel, ORNL associate laboratory director; NNSA Administrator Brandon Williams; U.S. Rep. Chuck Fleischmann; ORNL Director Stephen Streiffer; and William Wheeler, ORNL site office manager at the ATOLL ground-breaking ceremony. On June 3, Brandon Williams, administrator of the National Nuclear Security Administration, was at Oak Ridge National Laboratory to break ground on the Advanced Testbed and Operations Learning Laboratory (ATOLL).