David's rhetorical question, of course, received no answer, and seeing this, he presented his conclusion:
"Let's take a look at what happened on December 13th, the day we intercepted the first signal, gentlemen, you must remember."
The date was instantly recognizable, and Claire answered immediately:
"Nuclear bombs, two hydrogen bombs exploded."
Crack!
David snapped his fingers:
"Yes, two hydrogen bombs exploded, and on the same day, we intercepted the first signal.
Although a signal was captured again three days after the third hydrogen bomb explosion, consider that for more than a decade prior, we found nothing. The connection between hydrogen bomb explosions and the signals is the most significant; otherwise, there's no reason why, after so many years of finding nothing, we would suddenly be able to detect something."
"By your reasoning, it should have sent such signals countless times."