Isaac Asimov, L. Sprague de Camp, and Robert Heinlein at the Philadelphia Navy Yard: In 1942 three of the country's leading SF writers – Robert Heinlein, Isaac Asimov, and L. Sprague De Camp – all started working together at the Philadelphia Navy Yard. The US had just entered WW II, and everyone wanted to contribute. Heinlein and De Camp were too old and too unfit to fight, and Asimov hated the getting-shot-and-dying part, but they still wanted to chip in. They were three of the most imaginative people in the country, so what did the Navy actually have them doing?