sentences:  The 'Crucible of Leadership' is a concept allowing leaders to embrace extreme challenges (as opposed to avoidance) and taking time to discover the 'self' through introspection.Colonna lives in Boulder, Colorado.He has served as a director of a number of non-profit organizations including Pencil (Public Education Needs Civic Involvement in Learning), The Queens College Foundation, Exploring the Arts Inc., Kripalu Center for Yoga and Health in the Berkshires, and Shambhala Mountain Center.