SWAT 4 Expansion Details

The SWAT 4 Preview on 1UP (thanks Frans) has additional details on plans for Irrationals' yet-untitled add-on for the latest installment in the police shooter series:
Several new missions, including a warehouse strewn with catwalks on which snipers can set up camp and a decimated office building where you'll rescue civilians in the aftermath of a devastating bomb blast, introduce desktop do-gooders to SWAT's new toys. But, as Pawlicki says, the expansion pack offers far more than a few extra maps. Check out the accompanying sidebar, where we issue an all-points bulletin on the SWAT 4 expansion's brand-new features.