You will never get a piece of NASA! I was in FL when the nose of the Columbia wash up on a Merritt island beach. The lady that found it called NASA and reported it. When they came she requested one of the black tiles to keep for a memory. They said it was government property and they didn't want to have a memory of one of there failures. They comed the beach with detectors, but it was high tide. I went back at low tide and hit the edge of the water and came up with a bent , burned on one side piece of the Columbia. Hay I can 't have it authenticated, they would compenscate it. But I know I have the only piece! Frank...