 A panel discussion at the recent Aspen Security Forum focused on the issue of national security and resiliency and what is being changed in order to modernize the armed forces in the 21st century. Secretary of the Army Christine Wormuth. We are undergoing the period of most profound change in the United States Army in the last 40 years. Wormuth says that a large part of that is updating the weaponry used in American stockpiles to reflect the leap in technology over the last several years.