Next airing Wed May 2, 6 p.m. ET

Fog of War

Go to the front lines with San Diego Border Patrol Agents in their ongoing battle against drug smuggling and illegal immigration. Follow along as they discover 30 people elaborately concealed in the back of a tractor-trailer. Watch as they race under the cover of a blinding fog to prevent illegal border crossings. And witness the unearthing of a huge payload of marijuana carefully hidden behind the cab of a tractor-trailer.