NASA astronaut Butch Wilmore visits with construction workers at the new SLS test stand, 4693, in the West test area of MSFC followed by a media event with NASA administrator, Charles Bolden

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

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