Here’s what we’re working on for 4PM ET:

Hot-Spotting Jobs: Enrico Moretti, UC Berkeley economics professor and author of The New Geography of Jobs will be here. You could have all the training and skills in the world, but unless there’s a job at the end of the tunnel, what’s the point? Many workers are opting to relocate where the jobs are — and if can pay off big. Our guest today, Enrico Moretti, says that where you live is the biggest factor in finding a job, keeping it, and getting the salary you want.

The Wednesday Mega-Panel: Imogen Lloyd Webber (@illoydwebber), Jonathan Capehart (@capehartj) + Rob Cox (@rob1cox) will be here.  The Romney campaign and the RNC are set to go after Joe Biden, hoping the VP will turn himself into a liability for the Obama campaign.  We love his honesty — and don’t we need more of that in Washington?

The Specialist: Michael Ross, political science professor at UCLA and the author of The Oil Curse: How Petroleum Wealth Shapes the Development of Nations will be here.  When you really think about it, we fight wars over two things on this planet, for the most part: energy and good.  This is why energy and food sustainability is good national security!

The Debate over Unpaid Internships: Matthew Segal (@ourtimematthew), co-founder and president of Our Time.org will be here.  Unpaid internships are considered a foot in the door for many college students, but for many companies it has become a source of free labor.  With new college graduates entering the job force this month and few jobs out there, for many, taking an internship is the only option.  Are unpaid internships worth it in a tough economy, or are they simply unpaid labor?

Melber’s Minute: Ari Melber (@arimelber) is here — he’ll be asking the question, has big brother gotten TOO BIG?

That’s it for today! As always, join us on Twitter throughout the show @DylanRatigan.  See you at 4PM ET.