A second dress rehearsal is happening this weekend for the new terminal at Pittsburgh International Airport.

It's a final exam of sorts, words that spawn butterflies and make students sweat.

This time, the student is the new airport terminal and the examiner, 2,500 people from the Pittsburgh area.

What depends on this final exam is when the new terminal will open.

When you spend $1.7 billion on a shiny new terminal, before you open it to travelers, you want some reassurance that everything is going to work, so Saturday's test is critical.

"It's testing the systems of the new airport," said Bob Kerlik, Director of Public Affairs at the Allegheny County Airport Authority. "When we open the new airport, we want it to be ready. So it's going to be day one operationally, but we want it to

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