NASA astronaut Butch Wilmore exchanges jacket and hard hat with one of the construction workers building SLS test stand 4693 in the West test area of the Marshall Space Flight Center

DAWN STANLEY POSES IN FRONT OF TEST STAND 4693, FOR ARTICLE IN FORBES MAGAZINE WEBSITE ABOUT WOMEN IN TECHNOLOGY

TODD MAY,CHARLIE BOLDEN AND ASTRONAUT BUTCH WILMORE BRIEF NEWS MEDIA ON PROGRESS OF NEW TEST STAND CONSTRUCTION FOR SLS TESTING

Pictured is a view of Marshall Space Flight Center’s campus from atop test stand Building 4693.

TODD MAY,CHARLIE BOLDEN AND ASTRONAUT BUTCH WILMORE BRIEF NEWS MEDIA ON PROGRESS OF NEW TEST STAND CONSTRUCTION FOR SLS TESTING

Overall view of test stand 4693 in the west test area. The stand is scheduled to have another 3 story section added

TODD MAY,CHARLIE BOLDEN AND ASTRONAUT BUTCH WILMORE BRIEF NEWS MEDIA ON PROGRESS OF NEW TEST STAND CONSTRUCTION FOR SLS TESTING

NASA astronaut Butch Wilmore in a group photograph with construction workers building SLS test stand 4693 in the West test area of the Marshall Space Flight Center

More than 700 NASA Marshall Space Flight Center team members, Boeing employees, Team Redstone participants and local officials filled 17 buses Feb. 6 to view the liquid hydrogen tank structural test article installed in Test Stand 4693 at Marshall. The 149-foot liquid hydrogen tank structural test article is the largest piece of structural test hardware for the core stage of NASA’s Space Launch System (SLS). At 221 feet tall, Test Stand 4693 is the largest test stand at Marshall -- as well as one of the newest. During testing, dozens of hydraulic cylinders in the test stand will push and pull on the tank to simulate the stresses and loads it will endure during liftoff and flight for lunar missions.

PHIL HENDRIX, SPEAKS TO THE CROWD IN FRONT OF A STEEL BEAM DESTINED FOR TEST STAND 4693 DURING THE STRUCTURE'S TOPPING OUT CEREMONY APRIL 12.

TIM FLORES SPEAKS TO THE CROWD IN FRONT OF A STEEL BEAM DESTINED FOR TEST STAND 4693 DURING THE STRUCTURE'S TOPPING OUT CEREMONY APRIL 12.

HEATHER HANEY SIGNS FINAL BEAM TO BE PLACED ATOP TEST STAND 4693 DURING THE STRUCTURE'S TOPPING OUT CEREMONY

JENNIFER PRUITT AND BUDDY CLARK SMILE FOR THE CAMERA BEFORE SIGNING THE FINAL BEAM TO BE PLACED ATOP TEST STAND 4693 DURING THE STRUCTURE'S TOPPING OUT CEREMONY

BOB DEVLIN, DEPUTY DIRECTOR OF MARSHALL'S OFFICE OF CENTER OPERATIONS, SPEAKS TO THE CROWD IN FRONT OF A STEEL BEAM DESTINED FOR TEST STAND 4693 DURING THE STRUCTURE'S TOPPING OUT CEREMONY APRIL 12.

PLACEMENT OF THE FIRST STEEL GIRDERS FOR THE NEW SLS TEST STAND # 4693

MSFC Director Todd May, (green hard hat), poses with FBI Associate Deputy Director Paul Abbate, (4th from right), and agents atop SLS Test Stand 4693 with view toward land being cleared for FBI complex.

MSFC Director Todd May and FBI Associate Deputy Director Paul Abbate pose atop SLS Test Stand 4693 with historic TTB test stand in background

MSFC Director Todd May presents token to FBI Associate Deputy Director Paul Abbate atop SLS Test Stand 4693

PLACEMENT OF THE FIRST STEEL GIRDERS FOR THE NEW SLS TEST STAND # 4693

Dr. Ruth Jones, Branch Chief for Industrial Safety Branch (QD12) at MSFC, at Test Stand 4693 which holds the Space Launch System Liquid Hydrogen Tank. Photo for publication in University of Arkansas, Pine Bluff, Alumni magazine.

TEST STAND 4693 CONSTRUCTION RISES ABOVE THE TREE LINE. OCTOBER 23, 2015