Acceleration radiation emitted by neutral atoms undergoing uniform acceleration is a rich but somewhat subtle problem. Indeed R. Feynman had a note on his final blackboard listing “acceleration temperature” as something “to Learn!” In the present talk we will show that a uniformly accelerated atom in Minkowski spacetime emits entangled photon pairs in a squeezed state. Similar emission of photon pairs occurs if an atom is held above the black hole event horizon.