Once again, the final #DeltaIVHeavy #launch is upon us.
The #DeltaIV has always been, in my opinion, the classiest looking EELV.

The #Delta IV and its predecessors have made incredible contributions to #science and #spaceflight.

A #ThorDelta launched #Echo1, the first comm #satellite. #DeltaII launched missions to #Mars and began building the #GPS system.

The Delta family will be missed.