"Thank you, Grayson. Simply put, we felt that you were well meaning but wrong. This is actually a political issue, not a scientific one. I mean, we wouldn't know about the danger without you scientists, true. But it is a political problem with a political solution."

"Which is to say military," Deedee said. "Ms. President."

"Strategic. There's a time-honored distinction.""Strategic, until you push the b.u.t.ton," Pauling said. "Then it's military."

"And the reason for strategic preparedness is to prevent war."

"Ms. President," Rory said, "what are you going to use to scare these s.p.a.ce aliens with? Nuclear weapons?"

"Better than that." She pulled a diagram from the folder. "Though it uses a nuclear weapon for fuel."

The diagram was just a polar view of the earth, with a dotted orbit surrounding it, about four thousand miles up. There were three equidistant Xs on the orbit.

"Each of these three shuttles has a one-shot maser, microwave laser, generator. It turns the power of a hydrogen bomb into a single blast of energy powerful enough to vaporize anything. At any given time, two of the three will cover any approach to Earth."

"Boy, I hope they don't have four ships," Rory said.

"What?"

"Ms. President, if you were going to invade another planet, would you send just one ship?"

"Well ... I'm sure we can put any number of these things in orbit ... "

"On orbit," Pauling said. "And there are only three. Two of them aren't even-"

"You're always saying that, Grayson. As if you could be on an orbit the way you're on the street. I suppose we should make more."

"You can't," he said. "Even if it were legal-and it's not; they would be in violation of international law-you can't build these things in a month, no matter how much money you throw at the contractors."

"I think there may be more someplace," she said expressionlessly.

"I don't suppose they ever pa.s.s over France or Germany," the chancellor said.

"Several times a day," Pauling said.

"But that's immaterial," the president said. "These point up, not down. And we've worked out the international aspects. The UN Security Council will be part of the decision-making process."

"They point whichever way we want them to," Pauling said. "And the UN's big red b.u.t.ton doesn't have to be connected to anything."

The president sighed. "You've always been such a good team player, Grayson. Until this thing came up."

Pauling faced the others. "I was the only cabinet member not in favor of this scheme. But then I'm the only one who knows an electron from his asteroid."

"As I said, it's no longer a scientific problem. The science has been solved. But we still have our people to protect." She was trying to look presidential but was obviously p.i.s.sed at Pauling. He had probably said he was going to behave.

"Have they been orbited yet?" Rory said, avoiding the in-orbit/on-orbit controversy.

"No, Dr. Bell, they're undergoing checks. They'll go up next week."

"No matter what our advice is," Deedee said.

The governor cleared his throat and spoke for the first time. "Dean Whittier, with all due respect, the president and her cabinet have considered the scientific aspects of this along with all others-"

"And come up with the wrong decision!" Rory snapped. "This is like children setting up a practical joke to surprise Mommy when she comes through the door. She is not going to be amused."

"I have been a.s.sured that there is no conceivable defense against these weapons."

"Oh, please. The Praetorian Guard was invincible in its time, but one soldier with a nineteenth-century machine gun would destroy them in seconds."

The president stared for a moment, perhaps listening to someone offstage explaining what the Praetorian Guard was. "Science is on my side here, Professor. This energy beam goes at the speed oflight. Do you know of any way to detect it and get out of its way?"

"No, but neither do I have a s.p.a.ceship that can go the speed of light. If I did, I'd probably have something to protect myself against twenty-first-century weapons."

"Exactly my point last night," Pauling said. "The only thing we know about these creatures is that their science is beyond our comprehension."

"You may be committing suicide for the whole human race," Rory said. "Or murdering the human race out of ignorance and hubris."

"This is not just a bad idea," Deedee said. "This is the worst idea in history."

The president's famous temper finally boiled over. "Then history will judge me! Not a roomful of professors!" She disappeared, along with Pauling. The governor faded out with a fixed smile pasted on his face.

It was just the three of them, s.p.a.ced around a plain round table.

Rory sipped cold coffee. "I think she has a thing about professors."

"Professors tend to have a thing about her," the chancellor said.

"We don't have to keep this secret," Deedee said. "We ought to get the word out before the administration does."

Mai shook his head. "She said it was top secret."

"I don't have any clearance," she said. "Do you?"

"I can probably get Marya Washington," Rory said. "She's not exactly pro-administration." She took a phone out of her purse and punched two numbers. She nodded at a robot voice. "Tell Marya that Rory Bell, down in Florida, has to talk to her immediately. Big scoop." She pushed the "off b.u.t.ton. "Big scoop of something."

"I need a real cup of coffee," Deedee said. "Go by Sara's on the way back?"

Mai checked his watch. "You two go. I still have time to show up at a budget hearing and surprise some people." He smiled and the smile faded. "Let me know if you need any help, Rory. With the cube people or Her Nibs."

"Thanks, Mai. I may need you to back me up on what the president said."

"Count on it." He looked at Deedee. "See you Sat.u.r.day?"

Deedee "With bells on." The chancellor nodded, snapped his attache case shut, and left.

"Hobn.o.bbing with the greats?" Rory said.

"He's a tiger in bed," she said hoa.r.s.ely. " 'Administer me! Administer me!' " They both laughed. "It's something the provost dreamed up. They've invited all the four-point seniors to a barbecue with all the deans and Mai. Should be fun, if Mai and I aren't in some dungeon in Washington, along with you."

"Any bets as to who he'll show up with?"

"I don't gamble with love." There was a faint rumble of thunder, and she held up an umbrella. "Beat the rain?"

They didn't. Halfway to Dos Hermanos the skies opened up. The umbrella kept their heads dry, but not much else.

Dos Hermanos was warm and crowded. They sat at the bar and ordered cafes con leche.

"So it's us against the president of the United States," Deedee said. "Where do we go from here?"

"You know, she didn't say why she called the meeting," Rory said. "She must have known what our reaction was going to be. So what did she gain by letting us know before a general announcement was made?"Deedee shook her head. "Maybe it was Pauling who set it up. She pretty much does what her cabinet tells her to do."

"Yeah, Snow White and the Fourteen Dwarfs. The executive branch has seen better days." The coffee came and Rory stirred in a spoonful of sugar. Deedee just sprinkled a little cinnamon on top. "I wonder," Rory continued. "What if you could get someone to claim that this was a declaration of war, and need the approval of Congress?"

"Well, she owns the House, except the Greens. Put the House Greens with the Senate Democrats, you'd at least have some noise. But I don't think you can declare war against a vessel-or a message, which is all we really have."

She held the coffee cup to warm her fingers and sniffed deeply at the cinnamon. "I think the key is going to be education, or propaganda. Your newscaster is probably our most powerful weapon. If the gallups tell LaSalle not to launch the things, she won't."

Pepe burst through the door, drenched, holding a soggy newspaper over his head. "Hola!" He dropped the paper into the recycle bin.

There were no seats at the bar. He stood between them and ordered a double espresso.

"How'd the meeting go? Is Fearless Leader smarter in person?"

"A regular Hawking," Deedee said, and in low voices the two of them summed up what had transpired.

"I wouldn't be too worried," he said. "She's just putting on her 'woman of action' hat. France is going to raise holy h.e.l.l, and Russia, too. She'll never get the Security Council behind it, and she knows that.

She's posturing. Campaigning."

"Wish I could be sure of that," Rory said. "Sounds too sophisticated for her." Her phone rang and she plucked it out of her purse. "Con permiso. I have a call in to Marya Washington." She pushed the "record" b.u.t.ton. "Buenos?"

Her jaw actually dropped; sharp intake of breath. "Did you record it? I'll be right over." She folded up the phone and put it away. "That was Norman, at the office. There's a new message from the aliens. A long one."

They left three coffees steaming on the bar.

Norman He thumbed in a blank crystal and made another copy, for safety's sake. Then he sat and read the message on the wall: We will arrive on Earth exactly one month from now, landing at Cape Kennedy 1200 Greenwich Standard Time on January 1. We will use the old shuttle landing strip. Please make sure it is clear and smooth.

We have a message that must be delivered in person. Recognizing the need for some ceremony, we will stay for a short time. Soon after landing, though, the runway must be clear for our departure. The nature of our message will make it clear why timing is crucial.

If we are delayed, your planet will be destroyed.

If any action is taken against us, every human being on Earth will die, whether we survive or not.

Our intentions are peaceful, but we know your nature well enough not to come unprotected.

We will provide a small demonstration of our power as we approach, by destroying the mar-tian moon Phobos. Be sure that there is nothing of value on that moon by Christmas.

We do come in peace, and we bring a message of hope.

Norman grinned. The third part.i.ta would be Christmas hymns, combining and then clashing, buildingto chaos and silence.

He would write the fourth part.i.ta after he heard what they had to say. If composer and audience were still alive.

Rory came bustling in with Deedee and Pepe, all of them drenched. They stared at the message, wordless. The phone chimed, over and over. Someone important, or the secretary would just file a message.

Still looking at the writing on the wall, Rory groped behind her and found the chair at her desk. She sat down slowly and pushed a b.u.t.ton. "Buenos."

"I don't know how you did it." President LaSalle's face on the screen was blotchy, livid. "But it's not going to work. We will have those weapons in orbit in a week."

"Ms. President," Rory said, "I just saw this message one minute ago for the first time. I a.s.sume it did come from the s.p.a.ceship?"

"That's what the NASA people say. But the timing is too perfect. I don't know how you did it, but you did it. And it's not going to work."

"Why don't you ask your NASA people how I could manage that trick?" she said slowly. "I a.s.sume they picked it up on the Moon as well as here. So by simple triangulation, you can tell how far the message has come. It was probably sent before we began to talk."

"Impossible," the president said, and disappeared.

"Pepe, go check on the Moon?" The phone started chiming again. Rory shook her head and stabbed the b.u.t.ton.

It was Marya Washington, her face distorted and bouncing around the screen. "Rory, I'm in a cab to JFK. The station's putting me on their own plane; I'll be down in Gainesville"-she looked at the inside of her wrist-"in maybe ninety minutes. Can we have lunch?"

"Uh ... sure. We have a lot to talk about."

"That Mexican place on Main Street? At twelve o'clock?"

"Yeah, fine."

"Good. Mas tarde." The screen went blank.

"What the h.e.l.l was that all about?" Norman said. "The prez?"

"That's what our meeting was about. She wants to orbit those killer satellites. The secretary of defense's idea, I take it. But all the cabinet's behind it, except Pauling."

Norman let out a little snort. "I guess this means we won't be invading France. Just frying it."

Pepe was mopping his long hair with a paper towel. "Surely she'll reconsider after she calms down."

He gestured at the screen. "Or wiser heads may prevail."

"Wiser heads better get her out of office," Deedee said. "The woman is seriously bent. She sees everything in terms of conspiracy."

"Yeah," Norman said. "Poor old Brattle."

"Who's Brattle?" Rory said. Everybody looked at her.

"Undersecretary of defense," Norman said. To the others: "She doesn't listen to the news."

"She had him charged with sedition," Deedee said. "Sedition! 'Moderation' is more like it. But he's being investigated by a closed committee. Essentially under house arrest."