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"One of the longest-lasting Ziff-Davis House Names, originally the personal pseudonym of David Vern [...]. The name was later used by Howard Browne, Millen Cooke, Chester S Geier, Randall Garrett with Robert Silverberg (who also wrote solo under the name), Roger P Graham (Rog Phillips), Edmond Hamilton, William L Hamling, Heinrich Hauser, Berkeley Livingston, Herb Livingston, William P McGivern, David Wright O'Brien, Louis H Sampliner, Richard S Shaver, Don Wilcox and Leroy Yerxa. A large number of stories were published as by Blade, most in Amazing and Fantastic Adventures and some in Imagination, Imaginative Tales and Science Fiction Adventures. The name was last used by John Jakes for "The Deadly Mission" [...]."
Basically it's dull and unexciting. And not very interesting.
And it's predictable. There's already been a few stories written about someone sneaking onto a rocket that is, predictably, going to be blown up. It was the Era of the Cold War after all.
And there's no dramatic tension in the story. Bobby sneaks onto the rocket and we leave him hiding there. Dad comes home from work, pecks his wife on the face and goes looking for Bobby.
Bobby is in bed. We are told, in hindsight, he came home because he chickened out and left the rocket.
And they all lived happily ever after, and went on to fight the Cold War another day.
Fizzle.
The story needed drama, a building up of the danger Bobby was in, a heightening of the tension as "ZERO HOUR" approaches.