President Barack Obama will get the first question tonight.
The debate will focus on the economy and other domestic issues. Let's get inside for a sneek peak at what we can all expect.
Final touches on the debate stage, transforming the arena into one big TV studio so 50 million people worldwide have an unobstructed view of the two candidates tonight.
What you'll see is Governor Romney and President Obama standing at podiums on the stage. Then we'll have the moderator Mr. Lehrer on the lower level.
Only a small fraction of the 8,000 arena seats will be filled, to keep open television lines of sight.