The Supreme Court on Wednesday upheld a Biden administration regulation on the nearly impossible-to-trace weapons called ghost guns, clearing the way for serial numbers, background checks and age verification requirements to buy them in kits online. Ghost guns were found at crime scenes in soaring numbers across the U.S. before the regulation went into place, rising from fewer than 1,700 recovered by law enforcement in 2017 to more than 27,000 in 2023, according to Justice Department data. MORE: https://www.wthr.com/article/news/nation-world/ghost-gun-rule-supreme-court-decision/507-c09ebc58-2332-4b51-ae27-447eac3f5341