Up on the office roof, testing out a satellite phone in the event of Mexico City going pear-shaped. It's a heavy piece of kit, quite bulky and I'd guess rather old. But after connecting the bits and pointing the 'dish' in the region of Venus (or somewhere), it worked.
Funny things roofs. An untidy sprawl of noisy air-con units, water tank, elevator machine room and pipes leading to and from who knows where. Seems a real waste of space.