NASA's Space Launch System and Orion spacecraft will provide an entirely new capability for human exploration beyond Earth orbit, and enable humans to visit an asteroid and eventually Mars. Designed to be flexible for crew or cargo missions, the two will provide a safe, affordable and sustainable way to continue America's journey of discovery from the unique vantage point of space. Boeing (BA) will begin acceptance testing and confidence welding on the SLS VAC this summer. The VAC welds together sections of the core stage, such as barrels, rings and domes, for a complete cryogenic stage. Boeing is responsible for the design, development, manufacture, test and assembly of the core stage and avionics for the SLS, and remains within budget and ahead of schedule.Less than two years into the program, Boeing is tracking toward conducting core stage Critical Design Review (CDR) up to five months ahead of schedule with active structures at production capacity and component hardware and software in qualification build and test phases. In partnership with NASA, Boeing continues delivering on-target technical and safety performance and development progress ahead of schedule and within budget.