Enough of this realistic future of insurance claims! Time for a little space opera! (Albeit one with a lot of hard science from back in the day, since Campbell went to MIT.) In the pages of Amazing Stories in 1936, this ran as a serial called Uncertainty. But Ace Books called it The Ultimate Weapon!
Our hero is Lieutenant Buck Kendall of the Patrol, whose ship is cruising out around Pluto. He’s about to have a very bad day….