Door Watcher Equipment

"Because we didn't know what was going to come out we had to proof it against everything: Radiation, earthquakes, electromagnetic fields, you name it."

"[...] what after all those years amounts to the single most colossal waste of money in human history. Fifteen years and we haven't measured a single particle coming from the doors. However as soon as somebody brings up a new possibility (which is usually equal parts measurable and expensive) humanity watches wide-eyed as yet another hundreds of thousands of dollars is erected in front of a door, a towering, beeping, buzzing testament to pointlessness."