Brad Pitt: Man on a Mission

Brad Pitt is on a mission of mercy!

He's back in New Orleans today on his environmentally-friendly campaign to rebuild the Gulf Coast.

“I don't think it's just celebrities, it's just people," he said. "We're just talking about people helping people.”

And Brad's big heart just keeps getting bigger.

Spies tell “Extra” that Brad tipped a security guard $300 after he and Angelina took the family to Chicago's Field Museum!