KVUE Border Bureau followed two stories out of Mexico.
Weeks after a shootout at Mexico City's International Airport, authorities replaced every one of the hundreds of federal police who worked there.
Back in June, police working with cocaine smugglers opened fire on their fellow officers inside the airport. Three of them died.
Now all 350 officers posted at that airport have been reassigned.
Their replacements went through what federal police call a "double" background check.
Angela Kocherga has the story.