Milton Windler was the flight director on console when an oxygen tank ruptured aboard Apollo 13, crippling the spacecraft during its flight toward the Moon. He worked with fellow flight director Gerry Griffin to poll Mission Control's controllers for the three options that would fire the lunar module's engine long enough to bring Jim Lovell, Jack Swigert and Fred Haise home. Windler died on October 1, 2026, at 94, surrounded by family, according to a notice from his relatives reported by collectSPACE. Known to his team by the call sign Maroon Flight, he was one of four NASA flight directors who guided that rescue, and across the Apollo and Skylab programs he also worked shifts for Apollo 8, 10, 12, 14 and 15 and all three crewed missions to Skylab, the nation's first space station.

Windler was born on January 10, 1932, in Hampton, Virginia, and trained as an aeronautical engineer, graduating from Virginia Tech in 1954. He joined the Air Force's Reserve Officers' Training Corps while still in school, worked for NASA's predecessor agency, the National Advisory Committee for Aeronautics, and then served four years in the Air Force before rejoining NACA at Langley Research Center. He was still there when the center became part of NASA, and he relocated to Houston as the Manned Spacecraft Center, now the Johnson Space Center, was being built.

Windler worked recovery operations during the Mercury and Gemini programs before NASA named him a flight director in 1968, the seventh person given the title and one of the first two chosen from outside the flight operations ranks. His team took the call sign Maroon Flight, and his first mission at the console was Apollo 8, where his third shift put him in charge of Mission Control for the translunar injection burn that sent Frank Borman, Bill Anders and Jim Lovell toward the Moon, the first humans to leave Earth orbit. Ahead of the burn, Windler and his wife, Betty, quietly sewed a batch of red and blue flannel banners, each stamped with a white "1," for his team to wave as a message to the Soviet Union once the maneuver succeeded. He later wrote that the display was judged "inappropriate, especially since the mission was only half over," and the flags stayed folded; American flags came out instead when the crew splashed down safely.

Windler was named lead flight director for Apollo 13. "What that meant was you did the ascent, the liftoff from Earth, I should say, the launch, and you did the lunar surface activity," he said of the role in a 2006 oral history for the University of North Texas. "But then, of course, after we lifted off from the Earth, when we got more toward the moon, why, the whole mission changed." After the explosion, he and Griffin, call sign Gold Flight, worked through the options for the burn that would bring the crew home instead of landing on the Moon. For that work, Windler and his fellow flight directors and controllers received the Presidential Medal of Freedom from President Richard Nixon at a ceremony at the Manned Spacecraft Center on April 18, 1970, an honor documented in NASA's own photo record of the ceremony. He was also awarded NASA's Exceptional Service Medal.

Windler then served as flight director for all three crewed Skylab missions, where the challenge was different: planning around science happening in real time. "We had to come up with a system that would allow us to plan in real time and accommodate the science people," he said in the same 2006 interview. "If something interesting happened on the sun, which it did several times, then we needed to be able to schedule the ATM [Apollo Telescope Mount] work." The team built what Windler called flight planning "in real time, or cycles," pairing Mission Control with a designated "Science Czar" who gathered the next day's solar observation targets from the research staff each evening. That August, during Skylab 3, he was photographed walking fellow controllers through a model of the station cluster, pointing out where the telescope mount's film magazines sat.

After Skylab, Windler worked on the space shuttle program and the development of Canadarm, the Canadian built robotic arm later flown on the shuttle. He retired from NASA and moved into private industry, where he continued consulting on the International Space Station, first on operations planning and later on verification procedures as the station's modules were produced.

He and Betty (nee Selby) Windler raised three children and eight grandchildren. Looking back on the pace of the Apollo years in that same 2006 oral history, Windler said, "If I did it again, I'd probably try to do something more about trying to pay more attention. Apollo was, well, all of [the missions] were ... bang-bang-bang. You couldn't enjoy, really, in a way you couldn't savor it, like maybe it would have been better to have done." In May 2025 he returned to public life at the "Legacy of Apollo" gala at the San Diego Air & Space Museum, appearing in person alongside fellow Apollo veterans Charlie Duke and Gerry Griffin before an audience of more than 250, an evening recorded by the San Diego Air & Space Museum. A memorial service was planned in the weeks following his death at the family's former church in Friendswood, Texas.

What persists from Windler's console is concrete rather than ceremonial: the lunar module burn sequence he and Gerry Griffin worked out under pressure, still studied as a model for recovering a mission already underway; the real time flight planning cycles he devised so Skylab's science staff could chase a changing sun; and a Presidential Medal of Freedom earned not for a single decision but for an entire shift's worth of them, carried out days into a trip to the Moon that had suddenly become a trip to bring three men home alive.