Interested in becoming the best leader you can be? Consider becoming more vulnerable. That's the message in my book, in which I share life experiences on how vulnerability is no longer a dirty word when it comes to leadership. In a world that celebrates tough leaders who show no weakness, I suggest another model is more desirable. Using my own extensive experience from climbing the Army hierarchy to combat tours of duty in Iraq to a retail distribution center in the U.S., I show how the old model of leadership is becoming less viable in a changing world. After 33 successful years in the US Army and seven with Target Corporation, I am convinced that the answer to great leadership in the future lies in a single concept, the incredible power of vulnerability.