Defense Secretary Carter And Facebook COO Sheryl Sandberg Meet At Pentagon

ARLINGTON, VA - SEPTEMBER 21: Facebook Chief Operating Officer and founder of LeanIn.Org Sheryl Sandberg (L) and U.S. Defense Secretary Ashton Carter thank the female members of the military who participated in a 'Lean In Circle' at the Pentagon September 21, 2015 in Arlington, Virginia. Carter announced that the Department of Defense will now allow and encourage men and women in the armed forces to form and participate in 'Lean In Circles,' small groups of people who meet regularly and offer peer support while talking openly about gender issuses. (Photo by Chip Somodevilla/Getty Images)