How Amazon gets your order to you

For the holiday shopping season it's all hands and robots on deck at this Amazon Fulfillment Center in Tracy, California. There's tens of miles of conveyance that's always running around the clock ready. To make sure that we get the product to the customer on time. When you place an order [UNKNOWN] robots whisk around with selves of goods. A picker grabs your item then, it gets send down conveyor belts to be packed and shipped. The process takes just minutes. And this year Amazon has cut delivery time from days to hours in select cities. Due to our new program Amazon Prime Now. Which is in 20 cities Which can offer one hour or two hour delivery on thousands of items. But what if one hour delivery could be cut in half? Amazon thinks it's possible with drones. Revealing a new prototype in a recent video. Have the ability to leave a building like this. And delivered to someone's backyard in 30 minutes. The drones can fly for 15 miles and potentially deliver a number of smaller goods. >Well, over 80% of the items in this building weight five pounds or less and can be delivered by drone. The company appears to address safety concern in a patent. From the filing, drones could use lasers to detect distances and objects in their path. Amazon won't say when to expect the Prime Air service. The real hurdle on this is the regulatory hurdle, and we're working very hard with organizations within the US and globally to bring those regulatory hurdles down so that we can make this a reality. Holiday. Whether that happens in time for the next holiday season, is still up in the air. In Tracy, California, Lexy Savvides, CNET.com, for CBS news. [BLANK_AUDIO]