At this point we are all looking for lead tenants, but just watch what happens after the first two or three big deals are announced.

The lead tenant in the building today is Haltom's Jewelers.

CS First Boston is the lead tenant, with 1.2 million square feet.

"They realize that the best building in the best location can't go anyplace without a lead tenant."

The developers wanted to build a 28-story, 600,000-square-foot building, but plans were abandoned because they were unable to get a lead tenant.

The project's second phase, Two Commerce Square, did not begin until a lead tenant was secured for the building in 1990.

In the 1990s, Commerce Square's lead tenants reduced their presence dramatically in the towers.

With a lead tenant secured, construction of the identical tower commenced in July 1990.

The building is named after its lead tenant, cable company Comcast, which makes the skyscraper its corporate headquarters.

But with the United Nations as the lead tenant, representatives of 191 countries would have a stake in the future of ground zero.