https://grammarist.com/proverb/where-theres-a-will-theres-a-way/
https://www.bbc.com/news/world-us-canada-34934574
https://www.cnbc.com/2019/07/10/how-ohio-is-coping-with-high-opioid-overdose-rate-slamming-its-economy.html
https://www.psychiatrictimes.com/substance-use-disorder/what-does-rat-park-teach-us-about-addiction
https://aforeverrecovery.com/blog/drugs/drug-trafficking-stats/
https://www.businessinsider.com/drug-smugglers-methods-hiding-places-2017-4#catapults-13
https://www.bbc.com/news/world-latin-america-49002746
Dr. Pfeiffer, personal communication, August 12, 2019
https://brobible.com/culture/article/tshirt-cannon-drugs-prison-fence-oklahoma/
https://www.npr.org/sections/thetwo-way/2017/11/14/564050813/drug-shooting-bazooka-seized-in-mexico-as-smugglers-aim-skyward
https://www.cfr.org/backgrounder/us-mexico-border-woes
https://www.washingtonexaminer.com/news/drone-activity-by-drug-cartels-surges-on-san-diegos-border-with-mexico
https://www.insightcrime.org/news/analysis/5-clever-ways-mexico-cartels-move-drugs-over-us-border/
https://www.cracked.com/article_16816_the-7-most-ingenious-and-insane-smuggling-techniques.html
https://www.chron.com/life/houston-belief/article/Cocaine-Jesus-statue-seized-by-agents-in-Laredo-1777599.php
https://www.nbcsandiego.com/news/local/2018-customs-border-protection-biggest-busts-border-smuggling-drugs-502385332.html
https://www.youtube.com/watch?v=hOeSgKs94t0