Marshall Space Flight Center Director Todd May addresses guests and employees at the annual “Day of Remembrance” honoring those astronauts who have passed away.

Marshall Space Flight Center Director Todd May addresses guests and employees at the annual “Day of Remembrance” honoring those astronauts who have passed away.

Jody Singer, Marshall deputy director, lights a candle in honor of colleagues who lost their lives in purist of space exploration during Marshall's Day of Remembrance ceremony. Looking on, from left, are Rick Burt, Marshall Safety and Mission Assurance Directorate director; Marshall Center Director Todd May; and former NASA astronauts retired Army Brig. Gen. Robert Stewart; former Marshall Deputy Director Jan Davis; and Robert "Hoot" Gibson.

Retired astronaut, and retired Brigadier General, Robert Stewart addresses guests and employees at the Marshall Space Flight Center’s annual “Day of Remembrance” honoring those astronauts who have passed away.

Marshall Space Flight Center’s graphic display for the annual “Day of Remembrance” honoring those astronauts who have passed away.

Johnny Stephenson, Director of the Office of Strategic Analysis and Communications, addresses guests and employees at the Marshall Space Flight Center’s annual “Day of Remembrance” honoring those astronauts who have passed away. Looking on, from left, are Rick Burt, Marshall Safety and Mission Assurance Directorate director; Marshall Center Director Todd May; and former NASA astronauts retired Army Brig. Gen. Robert Stewart; former Marshall Deputy Director Jan Davis; and Robert "Hoot" Gibson.

Marshall Space Flight Center’s graphic display for the annual “Day of Remembrance” honoring those astronauts who have passed away.

Marshall Space Flight Center’s graphic display for the annual “Day of Remembrance” honoring those astronauts who have passed away.

Participants in Marshall Space Flight Center’s annual “Day of Remembrance are, from left to right, MSFC Director Todd May, retired astronaut Jan Davis, retired astronaut Robert “Hoot” Gibson, retired astronaut Robert Stewart, MSFC Deputy Director Jody singer, and Director of Safety and Mission Assurance Rick Burt.

Retired astronaut, and retired Brigadier General, Robert Stewart addresses guests and employees at the Marshall Space Flight Center’s annual “Day of Remembrance” honoring those astronauts who have passed away.

Retired astronaut, and retired Brigadier General, Robert Stewart addresses guests and employees at the Marshall Space Flight Center’s annual “Day of Remembrance” honoring those astronauts who have passed away.

STEVE MILEY, ASSOCIATE DIRECTOR OF NASA'S MARSHALL SPACE FLIGHT CENTER, LIGHTS A MEMORIAL CANDLE JAN. 30, HONORING THE BRAVE EXPLORERS WHO LOST THEIR LIVES IN PURSUIT OF HUMANITY’S DESTINY IN SPACE. MARSHALL, ALONG WITH NASA CENTERS AND PARTNER FACILITIES AROUND THE COUNTRY, HOLD DAY OF REMEMBRANCE CEREMONIES EARLY EACH YEAR TO RECOGNIZE ITS FALLEN HEROES