<human>:  I have a question about the P-38 lightning. How many were built?
<bot>: There were a total of 10,515 P-38 Lightnings built. The P-38 was a single-seat, single-engine, all-metal fighter aircraft. It was designed by the United States Army Air Corps in the 1930s, and was used by the US Army Air Corps and the US Navy during World War II.