![Two attendees compete in the biggest vape cloud competition at the Vape Summit 3 in Las Vegas, Nevada May 2, 2015. According to new research provided to Reuters, youngsters say that performing Two attendees compete in the biggest vape cloud competition at the Vape Summit 3 in Las Vegas, Nevada May 2, 2015. According to new research provided to Reuters, youngsters say that performing](https://c8.alamy.com/comp/2E6CA10/two-attendees-compete-in-the-biggest-vape-cloud-competition-at-the-vape-summit-3-in-las-vegas-nevada-may-2-2015-according-to-new-research-provided-to-reuters-youngsters-say-that-performing-tricks-is-one-of-the-top-two-reasons-they-began-using-e-cigs-reutersdavid-becker-tpx-images-of-the-day-2E6CA10.jpg)
Two attendees compete in the biggest vape cloud competition at the Vape Summit 3 in Las Vegas, Nevada May 2, 2015. According to new research provided to Reuters, youngsters say that performing
![Attendees compete in the biggest vape cloud competition at the Vape Summit 3 in Las Vegas, Nevada May 2, 2015. According to new research provided to Reuters, youngsters say that performing tricks Attendees compete in the biggest vape cloud competition at the Vape Summit 3 in Las Vegas, Nevada May 2, 2015. According to new research provided to Reuters, youngsters say that performing tricks](https://c8.alamy.com/comp/2CX915M/attendees-compete-in-the-biggest-vape-cloud-competition-at-the-vape-summit-3-in-las-vegas-nevada-may-2-2015-according-to-new-research-provided-to-reuters-youngsters-say-that-performing-tricks-is-one-of-the-top-two-reasons-they-began-using-e-cigs-reutersdavid-becker-2CX915M.jpg)
Attendees compete in the biggest vape cloud competition at the Vape Summit 3 in Las Vegas, Nevada May 2, 2015. According to new research provided to Reuters, youngsters say that performing tricks
![Nate Diaz speaks vapes during the UFC 202 post-fight press conference at T-Mobile Arena on Saturday, Aug. 20, 2016, in Las Vegas. (Erik Verduzco/Las Vegas Review-Journal) Follow @Erik_Verduzco | Las Vegas Review-Journal Nate Diaz speaks vapes during the UFC 202 post-fight press conference at T-Mobile Arena on Saturday, Aug. 20, 2016, in Las Vegas. (Erik Verduzco/Las Vegas Review-Journal) Follow @Erik_Verduzco | Las Vegas Review-Journal](https://www.reviewjournal.com/wp-content/uploads/2016/08/web1_mma-ufc202gamer_082016ev_073_6888529.jpg)