Nov. 11 (UPI) -- Divers off the east coast of Florida have discovered remnants from the space shuttle Challenger, which exploded after liftoff from Kennedy Space Center more than 36 years ago. A television crew inadvertently made the find while searching for the wreckage of a World War II-era warplane at the bottom of the Atlantic Ocean. That's where the dive team noticed a large, flat metal object with distinct 8-inch square tiles lying on the ocean floor. The item's proximity to Florida's