How did famous New Orleans jazz trumpet player Louis Armstrong get his first horn? Seven-year-old Louis Armstrong was too poor to buy a real instrument. He didn't even go to school. To help his mother pay the rent, every day he rode a junk wagon through the streets of New Orleans, playing a tin horn and collecting stuff people didn't want. Then one day, the junk wagon passed a pawn shop with a gleaming brass trumpet in the window. . . . With messages...