On this day, 60 years ago, May 25, 1961, John Kennedy challenged America to put a man on the moon before the end of that decade.

Though the technologies needed to achieve that goal had only been envisioned, not yet built, bold expert engineers thought the goal was within reach, and that the alternative, of ceding Cold War technological supremacy to the Soviet Union, was not acceptable.

Similarly today, President Biden has set goals for climate action that some feel are too optimistic. In our case the technologies needed are fully available already, with more improvements sure to come.