"No," Alan admitted. "It's no bluff. Two weeks ago, Keifer shut the flow of water through the space-warp from Venus to Mars. Now I realize why. He did it partly to get the people of Mars behind him when he issued his own ultimatum. He didn't want a revolution on his hands. But he did it for another reason, too. "Gentlemen, if you know your astronomy, you'd know that a fairly rare astronomical event has happened. Venus, Earth and Mars are all in conjunction on the same side of the sun. To put it another way, Venus, with the shortest, fastest orbit, has overtaken the Earth's orbital position with respect to the sun. That's known as the synodic year. Earth has likewise overtaken slower Mars, so the three planets are lined up...." "Imbecile!" screamed the Minister from France. "Here you stand, giving us astronomical puzzles, while Earth hovers on the brink of disaster." "It's important," Alan said patiently. "Venus, Earth and Mars are in a line right now, Venus and Earth separated by some twenty-eight million miles, Earth and Mars by less than forty million. What I'm saying is this: Keifer didn't block Venusian water from the space-warp merely to rally the Outworlders behind him when he claimed you were responsible. He did it because the space-warp now passes within a couple of hundred thousand miles from Earth. He did it because he intends to transport the cobalt bomb here through the space-warp. I say that's the only way he can get it here in time!" President Holland stood up, his face white, excitement in his eyes. "Yes," he said. "Yes, it's possible. We'll check the data with the New Washington Naval Observatory at once. If what you say is true, Tremaine...." "It almost has to be true, sir. Keifer will need a launching site for his cobalt bomb after he takes it from the space-warp, but I have a hunch you'll find when you call the observatory that the moon's orbital position at this time passes within a few hundred miles of the space-warp. I say Keifer will launch his cobalt bomb at the Earth from the moon." Now the reporters suddenly friendly, were asking Alan so many questions that President Holland had to drag Alan away from them. A special jet took Alan, the President and a few advisors to the Naval Observatory, where Alan's theory was confirmed. One of the astronomers told President Holland jubilantly, "All you have to do is send a fleet out to where the space-warp intersects the orbit of the moon and...." "How can we?" President Holland groaned. "We've dispatched almost all our ships to Mars, Venus and the Jovian moons to help put down the Outworld insurrections. We're left with a few obsolete, ancient ships."