A convoy of trucks carrying tents, construction materials and portable toilets flows into a virtually abandoned airport in Florida's picturesque Everglades, a UNESCO World Heritage Site.But they're not helping build the region's next big tourist attraction.

Florida's attorney general says the migrant detention facility is on track to open in early July, at a little-used airfield in the Everglades. Environmental activists hope they can stop the project.

"Alligator Alcatraz" is the nickname for a planned temporary immigrant detention center in the Florida Everglades.