Valeriy Palnchuk, facilities engineer at the Space Needle, says his most difficult task was replacing the airplane-warning light at the top when it went out during the night. In his words: “The beacon is at the very top [605 feet] and sits inside a disk. It’s like a big wok. I hook up at the bottom, go through all the lights, then, at the top of the mast, I have to pull myself up about 8 feet higher to be in the ‘nest’ and change the bulb.” But he enjoys his job, especially walking “the halo,” the ring around the observation deck. Many tourists have taken his photo out there.