you're crazy! There wasn't an atom of artificial negamatter in the world
in 1969. Nobody had made any before us. We gave each other some
scientific surprises, then, but nobody surprised both of us. You and I,
between us, knew everything that was going on in nuclear physics in the
world. And you know as well as I do--"

A voice came out of the public-address speaker. "Some of the radio
equipment around the target area, that wasn't knocked out by blast, is
beginning to function again. There is an increasingly heavy gamma
radiation, but no more cosmic rays. They were all prompt radiation from
the annihilation; the gamma is secondary effect. Wait a moment; Captain
Urquiola, of the Air Force, says that the first drone plane is about to
take off."

It had been two hours after the blast that the first drones had gone
over what had been Auburn, New York. He was trying to remember, as
exactly as possible, what had been learned from them. Gamma radiation; a
great deal of gamma. But it didn't last long. It had been almost down to
a safe level by the time the investigation had been called off, and, two
months after there had been no more missiles, and no way of producing
more, and no targets to send them against if they'd had them, rather--he
had been back at Auburn on his hopeless quest, and there had been almost
no trace of radiation. Nothing but a wide, shallow crater, almost two
hundred feet in diameter and only fifteen at its deepest, already full
of water, and a circle of flattened and scattered rubble for a mile and
a half all around it. He was willing to bet anything that that was what
they'd find where the chunk of nega-iron had landed, fifty miles away on
the pampas.

Well, the first drone ought to be over the target area before long, and