. >> gary wolf is the founder of the movement, he coins the term a decade ago as an editor.re's tens of millions of people today that are tracking where they are going, their metabolism, their medicine, they symptoms, there movements there will be hundreds of millions in a blink of an eye, and they will be tracking a far bigger range than we can imagine. >> we stand on scales to get our weight. we have been tracking ourselves for a long time. >> i do think that what ice going on, in the world of the quantifies self, is based on some fundamental human practices and desires and needs to take stock. self-observation with new tools. >> many of the devices q.s.ers use allow them to share their personal data with others. that can enginedder a sense of community, and even support from like minded strangers but some say this can inhibit people from living in and enjoying the moment. >> it yours sources our memory, if we have the gadgets, the pictures the numbers we are apt to pay less attention to the world. >> you have to start to wonder whether this obsession with seeking data bec

. >> reporter: gary wolfe says trains are far safer than trucks.ight now, the only alternative to shipping crude oil across the country. >> i don't think the average person wants to be driving next to a 75 mile an hour rig carrying crude oil down the highway 12 feet away from your automobile. >> reporter: some oil companies are using new technology like taking a laser snapshot of each wheel as it goes over each section of the track. they then compare that shape to federal standards to make sure it doesn't have too much wear and tear. that has contributed to about a 50% drop in accidents since say 2005-2006, and the interesting thing is, six, seven years ago, there were about 50,000 oil shipments a year. that number is now up to over 400,000 so the number of shipments going up, accidents actually going down. >> very interesting. chris lawrence, thank you very much for that report. >>> a massive anti-terrorism operation is going on in russia right now after a pair of deadly bomb attacks. dozens of people have been detained but that's doing little to

gary v, if you don't know him already. when we come back, a day before the movie opens, we hear from the real wolf of wall street.he scam right? we'll find out when we come back. >> welcome back. venezuela has devalued its currency for foreign tourists i- 44%. is 11 to therate dollar compared to 6.3 for most other transactions. a lot of currency trading in venezuela is on the black market. times companies pay six in new devalued rate for dollars. a decade of currency controls in venezuela has made dollars hard to find. that is led to shortages in everything from tires to beef. that's today's latin america report. and the aftermath of a scam. what really happened at the firm portrayed in "the wolf of wall street?" we've got the real deal. you are watching "market makers" on bloomberg tv, streaming on your phone, tablet and now on applet -- now on apple tv. ♪ is"the wolf of wall street" one of the most anticipated movies of this year and that martin course -- the margins were say see film hits theaters tomorrow. it stars leonardo to cap audio as the one-time financial a dog whose one-time rise and fall has become t