The U.S. Supreme Court issued a unanimous ruling Thursday against the claims in a lawsuit from the Mexican government alleging that gun manufacturers were complicit in arms smuggling.

The Mexican government says that gun manufacturers in the U.S. were looking the other way as their guns illegally ended up crossing the border and getting in the hands of dangerous drug cartels.

'We have little doubt that, as the complaint asserts, some such sales take place — and that the manufacturers know they do. But still, Mexico has not adequately pleaded what it needs to.'

Mexico's attorneys pointed out that guns were severely restricted there, but the country was still awash in guns.

"You can't hide behind the middleman and pretend like you don't know what's happening," said Jonathan Lowy, the p

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