Billie the Kid
Novelette 19,678 words Recommended by 2 award/anthology sources
"Operation Cherry Blossoms will not change the final outcome, though there will be carnage, to be sure, when his three planes attack. Three planes, that is all. Two will defend the third, the one that carries the new superbomb the Germans call Das Biest. It is capable of destroying a city. That city is Los Angeles."
Quasar links out; the story lives on Asimov's, where the author gets the click.