With the Artemis program underway, NASA has once again turned to nuclear engines for far off Mars manned missions; specifically, a concept that was last listed in the 60s called NERVA.
NERVA, like it's brother Orion, was canned in the mid 1960s as proof of concept tests proved they could in fact be used to propel a spacecraft.
How do you feel about rockets irradiating hydrogen and then propelling them outside the back of a rocket engine in the next 15-20 years?