The U.S. has closed its southern border again to livestock imports, saying that a flesh-eating parasite has moved further north in Mexico than previously reported.

A surprise vote barring the Trump administration from moving the FBI’s headquarters to a new location in Washington, D.C., brought the Senate appropriations process to a halt — a setback for lawmakers ...

Havana, a two-year-old Shepherd mix, practices detecting screwworm on cow-sized equipment inside a greenhouse, a training exercise meant to mimic the sweltering heat the dogs must tolerate in Chiapas, ...

The U.S. Department of Agriculture works to neutralize -- again -- the flesh-eating larva of the New World Screwworm fly.