Glenn Mara, principal associate director for Weapons Programs (PADWP), center, and Joe Martz, left, Reliable Replacement Warhead program director, greet Sidney Drell, professor emeritus of physics at the Stanford Linear Accelerator Center and member of the Mission Committee of the Los Alamos National Security LLC Board of Governors on Monday at Los Alamos. The mission committee began a full schedule of briefings on the weapons programs and RRW on Monday.