So the Montreal Olympics in 1976 were originally estimated to cost 250 million dollars and ended up costing 1.something billion dollars. I mean does it really matter whether I say 1.2 or 1.7? I'm guessing that if you really looked into it, no one probably actually knows how much it really cost. My point is that that was an overly ambitious, poorly thought out project that appealed to the imagination of many. So if someone says a that a 2000 mile wall will cost 5.7 billion dollars, how much will it really end up costing when all the receipts are tallied? The tallying alone will probably cost hundreds if millions. 

Minus 16 Celsius. I caved in and took a ride to the airport instead of the bus, which would have required me to stand at a bus stop. Meanwhile in Bahir Dar the temperatures are dipping into the low teens at night. Which is chilly by local standards.