From: snidely.too@gmail.com   
      
   The ULA launch of an NRO bird has had it's issues.  They actually got   
   to ignition on Saturday morning (the wee hours, EDT) but just as the   
   livestream host, one of their senior engineers, said "liftoff", the   
   engines were shut down.   
      
      
   Instead of launching on time, ULA’s infrequently-flown heavy-lift   
   rocket was hit by 72 hours of delays to rectify minor pad hardware   
   bugs. Around 2 am EDT (UTC-4) on August 29th, Delta IV Heavy made it   
   just seconds away from liftoff before the rocket’s autonomous flight   
   computer detected an anomaly with pad hardware and aborted the launch.   
   As a result, the three cores’ three Aerojet Rocketdyne RS-68A engines   
   were forced to shut down after ignition – an uncommon Delta IV launch   
   abort scenario that has historically required at least a week of work   
   to recycle for another launch attempt.   
      
      
      
   This is expected to add a week to the pre-launch schedule, between   
   having to diagnose the issue and to get the launch vehicle ready again.   
      
   They had already extended their last hold by roughly an hour, for what   
   the audio seemed to say was a compartment thermal issue that they   
   decided they could live with, and the Aug 29 date was already a slip.   
   Several pre-flight articles around the web noted that the few launches   
   of DIVH made it hard to smooth out the routine, despite the maturity of   
   the Delta family (and there was B-roll during the hold of the history   
   of the Delta family, including the original Thor launches).   
      
   /dps "and DIVH has launched more times than SLS will"   
      
   --   
   Trust, but verify.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)