January 3, 2019: For the first time, the nation's defense hierarchy is no longer dominated by men. From the executive leadership of top weapons-makers, to the senior government officials designing and purchasing the nation’s military arsenal, the United States’ national defense hierarchy is, for the first time, largely run by women.

As of Jan. 1, the CEOs of four of the nation's five biggest defense contractors — Northrop Grumman, Lockheed Martin, General Dynamics and the defense arm of Boeing — are now women. And across the negotiating table, the Pentagon's top weapons buyer and the chief overseer of the nation's nuclear stockpile now join other women in some of the most influential national security posts, such as the nation's top arms control negotiator and the secretary of the Air Force.

It’s a watershed for what has always been a male-dominated bastion, the culmination of decades of women entering science and engineering fields and knocking down barriers as government agencies and the private sector increasingly weigh merit over machismo.

Read more: How women took over the military-industrial complex (www.politico.com)