I don't know how long it took, but finally my generator was finished. Finished, and portable. I strapped it to my back and picked up my longest and sharpest kitchen knife. I didn't have a gun, but it didn't matter. If my theory was correct, a knife would be just as good--and if I were wrong, a gun wouldn't help anyway. Then, without stopping to ponder, I ran downstairs and out into the street for the test. Fresh air smelled good after days of being cooped up in my little apartment. I stood in the middle of the street and surveyed the wreckage. Bodies lay everywhere, charred and lifeless. Overturned automobiles lay piled here and there, stalled trucks, artillery batteries and tanks. The defensive maneuver had failed, and what few people remained were in hiding. I stood alone in the middle of the street, the heavy generator on my back, and waved my kitchen knife as triumphantly as if it were Excalibur. "Come and get me," I yelled. "Come on Invaders. Let's see what you can do!" I looked up. There were a few clusters of them, browsing idly around some television antennas atop a neighboring building. They ignored me for a few minutes; maybe they were so surprised to see a living human in the streets that they were unable to move. I shook my fists at them. "Come down here where I can get at you!" I shouted. They hovered uncertainly--and then they came. * * * * * Six of them swooped down, humming and buzzing, glowing faintly and billowing in and out as they dropped toward me. I waited, waited until they were no more than three or four feet above my head, waited until I was dizzy with the strain and suspense and could wait no more. Then I snapped on the generator. It was like catching flies in molasses. The six aliens stopped dead in their tracks as my force-field spread out around them, engulfed them, imprisoned them. Suddenly they were forced to contend with more radiation than they could possibly swallow. It pinned them there, nine feet above the ground. I listened to their frenzied buzzing as they stretched themselves, elongated fantastically in an attempt to free themselves from the unexpected thing that had grabbed them. And then I stretched up on tiptoes and began to stab. My knife flashed once, twice--and the buzzing became an unbearable shriek. My heart surged as I struck home again and again. Now we had them! Now they were vulnerable! Snared in the force-field, they no longer were able to flicker out of phase with our dimension every time a weapon approached. They were anchored now, mired in our continuum, helpless before my savage attack. I kept stabbing until all six of them were torn and wounded, and then I snapped off the force-field. And they were gone. Instantly, without lapse, they popped out of existence like so many snuffed flames. _Six down_, I thought grimly. _Six down, and untold thousands to go. But now we have a weapon._