Lie #24:
We discovered a signal hidden in our satellite feed. The aliens were using our own network to synchronize their planet-wide attack. Evidently, they knew how to hack a satellite system but setting the time on their ships was a bit of a mystery. They had traveled 23 light-years with all of the clocks blinking "12:00:00".

As the countdown reached it's final few minutes, we shut down the network and restarted it, wiping out their countdown clock. That is why, three decades later, we have giant spaceships hanging over every major city, waiting for a signal that will not come.

They do provide some nice shade in the summers.