Facebook Chief Operating Officer Sheryl Sandberg stands with (l to r) Sgt. Dajon Ferrell, U.S. Army; Tech. Sgt. Lynette Olivares, 133rd Air National Guard; and Lt. Col. Erika Cashin and Maj. Susan McMullen, 934th Airlift Wing, during a visit to the 934th Airlift Wing Officer's Club Oct. 1. Sandberg, the author of the book "Lean In", talked with women and their daughters about some of their career challenges for women in the military and federal civil service. (Courtesy Photo)