(Correction: An initial update to this story misidentified OMB's FY-13 comments on Global Hawk as OMB's FY-14 comments. This has been corrected. An Air Force official's comments on Global Hawk at an April 10 press briefing have been added to the story.) The Defense Department's fiscal year 2014 budget request, slated to be unveiled today, would end production of Global Hawk Block 40 unmanned aircraft, ramp up funding for C-130J Hercules cargo planes and maintain plans to buy 29...