The answer is that the only things composed of one element are those elements themselves (e.g. carbon, hydrogen). There is no unitary media, unitary military, or unitary anything except the base elements.
The military has both liberals and conservatives, the quantity of each varying from time to time, so that internal control also varies from time to time.
Which means that the aerospace industry, including GE and other media owned by military industrial media complex corporations have internal struggles and their policy thereby changes from time to time.
This is nothing surprising because the populace itself and the government have the same or similar struggles as a matter of course:
The shape of a post-war Iraq, set to dominate tomorrow's US-British summit in Northern Ireland, is also the subject of fierce wrangling in Washington, with disagreements between Congress, the Pentagon and the State Department on everything from the make-up of an interim Iraqi authority to the control of humanitarian aid funds.(The Independent). That was one month after the Iraq war began in 2003 when all the bushies were seemingly marching in lockstep.
The same disagreements and struggles take place within the military command structure itself, and that struggle gets better or worse from time to time.
Another thing to consider is that the media giants owned by military oil media complex corporations need legitimate income to cover their illegitimate income from plunder, so the popular shows like Maddow and Olbermann are both a cover and a legitimate income source.
UPDATE: Some report that this type of struggle continues in the Obama Administration.