WTC steel columns installed at 9/11 museum

September 7, 2010 2:21:53 PM PDT
Steel columns salvaged from rubble are back at the World Trade Center site.

Two 70-foot columns from the wreckage of the north tower were returned over the weekend to the lower Manhattan site.

On Tuesday afternoon, one column was hoisted onto a support base. The president of the 9/11 Memorial and Museum, Joe Daniels, said he expected the other one to be raised on Wednesday.

The 50-ton columns have three prongs and are known as tridents.

They made up the facade at the tower's entrance.

For the past few years they've been kept at a Kennedy Airport hangar.

The $45 million museum is being built below the 8-acre memorial plaza. It's set to open next year.