so i think to myself oh what a wonderful world the race to deliver. we re back now with our series race to deliver. and consider this. on black friday amazon customers ordered 1,600 items every second how does the online retail giant do it tom costello got a exclusive and fascinating look behind the scenes. reporter: it is the final few steps of your amazon delivery usually arriving just two days after you click buy . 1 down. 150 to go. reporter: how do they do that at the old silver dome site outside detroit, amazon s newest fulfillment center, 8,000 yellow robots in constant motion delivering a smorgasbord of unrelated products to pickers like justin walsh filling hundreds