The FBI faces down a group of anti-government ranchers and heavily-armed militias who've taken over a federal wildlife refuge in Oregon. A car chase through the mountains ensues, and when one rancher refuses to surrender, the showdown turns deadly...

Agents uncover the largest oxycodone trafficking operation in American history. But building a case is easier said than done, when the drugs are legal. The FBI zeroes in on twin brother pain clinic owners, suspecting they're running a pill mill...