They told Lieutenant Carson the thing in the crate would save his life. They did not tell him it would make him feel like a complete idiot while doing it.He crouched by the wreck of his F-86 Sabre in the Korean brush, enemy voices echoing up the ridge, while he unfolded what looked like a child’s pool toy.The bad news was that there were 60 miles of hostile territory between him and safety. No radio. No backup. He had maybe 5 minutes before the commies got him.The good news? In front of him were 20 pounds of rubber, a lawnmower engine, and the worst idea the US Army had ever had.Carson looked at the sky. Then, at the bicycle pump in his hand. Then back at the sky.