 From the 1970s to 2014, the use of SWAT teams across the country increased by 15,000%. And while these teams were created to respond to rare and extremely violent incidents, the bulk of daily SWAT teamwork has turned to search warrants and high-profile arrests. And the decades of police militarization has been a boon for the arms industry, with some of the most influential gun companies making their fortunes on the backs of police.