The Supreme Court handed down a unanimous opinion on Thursday that shuts down a lawsuit brought by the nation of Mexico against US gun companies.

In Smith & Wesson v. Estados Unidos Mexicanos, Mexico sued seven American gun manufacturers, claiming that their products are often sold to gun traffickers who then provide these guns to Mexican drug cartels. The Mexican government claims that up to 90 percent of guns recovered at crime scenes in Mexico come from the United States.

Unfortunately for Mexico, however, a 2005 law known as the Protection of Lawful Commerce in Arms Act (PLCAA) gives American gunmakers broad immunity from lawsuits seeking to hold them liable for harms “caused by the misuse of firearms by third parties, including criminals.” PLCAA does contain some exemptions to this

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