Captain Marvel Jr. #30

This May 1945 Fawcett issue puts "The World's Mightiest Boy" front and center in grand fashion, with Mac Raboy's cover showing Captain Marvel Jr. bursting fist-raised through a wall in his blue-and-gold uniform, red cape flying, as a young boy shouts his name and a gun-toting figure lurks in the background. The tagline promises the story inside — "The Amazing Mr. Meteor" — and the explosive "BOOM!" on the cover suggests the action lives up to that billing. Raboy's clean, energetic linework gives the whole scene a real sense of momentum that made this series one of the most visually appealing of the Golden Age.