His name is Lieutenant General William Caldwell, IV, Commanding General of the US Army Combined Arms Center:
Command and General Staff College faculty and students will begin blogging as part of their curriculum and writing requirements both within the .mil and public environments. In addition CAC subordinate organizations will begin to engage in the blogosphere in an effort to communicate the myriad of activities that CAC is accomplishing and help assist telling the Army’s story to a wide and diverse audience.
Read more here. Via.