but it also has wheels can you see now in the picture on the white part, the upper part of the capsule, the interior space i m told is just about six feet, four inches. explain what those wheels do, gary. reporter: the wheels help it go up and down, anderson, throughout this tube. this is 2300 feet. it s almost half a mile up and down. and they tested it the other day to make sure that it could go down, those wheels could operate without scraping dust, without scraping rocks and without making damage. it was a successful trip. they brought it down 2100 feet, not the complete way. we asked the mine official why didn t you bring it all the way down, and they said they were afraid the miners would try to get in, he said that half jokingly, half seriously. it would take 17 minutes for each miner when they come up. a shorter amount of time to go