Col. Charles “Chuck” Roberts, incoming commander of the 61st Air Base Group, salutes as he reports in to Lt. Gen. Samuel A. Greaves, Space and Missile Systems Center commander and Air Force program executive officer for space, with four simple, yet time-honored words, “Sir, I assume command,” as he accepts responsibility of leading the 61st ABG during a change of command ceremony June 30 inside SMC’s Gordon Conference Center at Los Angeles Air Force Base in El Segundo, Calif. (U.S. Air Force photo/Van De Ha)