The mystery man known as D.B. Cooper sent a letter to newspapers after he parachuted from a plane in 1971 with $200,000 in ransom money. The letter was among newly released documents about the ...

Two cubes high-five as they prepare to compete. NARRATOR: Well, anyway… A 3D cube has six square faces. The faces of the cube are lit up to highlight all six. A judge writes 6 under faces on a ...