Space Industry Development - ULA's Vulcan rocket successfully completed its first national security mission, marking its third launch overall [1][2] - Vulcan rocket received certification in March after addressing a minor issue on its second flight, paving the way for future national security missions [3][4] - Europe's Ariane six also completed its third mission, aiming to reduce reliance on SpaceX [1] - Both Vulcan and Ariane six are positioned as competitors to SpaceX's Falcon nine in the launch market [5] - Falcon nine has held a de facto monopoly in its class for several years [5] - While Vulcan and Ariane six offer more options, they face challenges in matching Falcon nine's launch cadence [6]