Alan Shepard, n.All

Katherine ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠Johnson worked backward from Alan Shepard's planned splashdown point to calculate exactly when his Freedom 7 rocket had to launch.