https://www.fastcompany.com/1144485/obamas-high-tech-defenses-bullet-resistant-suit-tank-limo-and-one-huge-gun
https://www.dailymail.co.uk/news/article-1109082/The-Obamamobile-New-presidential-limo-unveiled--withstand-rocket-chemical-attacks.html
https://www.oregonlive.com/politics/2015/05/13_ways_secret_service_agents.html
https://www.nbcnews.com/news/us-news/protecting-president-secret-weapons-hefty-price-tag-n691306
www.pbs.org/wgbh/americanexperience/features/garfield-protecting-president/