‘Face’ appears in mangled girder from 9/11 crash site

Formed within a twisted steel girder, the mangled piece of metal is called Impact Steel

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A piece of debris from the North Tower of New York’s World Trade Center has reportedly been noticed by construction workers after a “face” appeared, formed out of the monument’s twisted metal, reported The Sun newspaper.

According to the newspaper, part of the twisted metal forms the image of a face with a wide open mouth. The workers at the National September 11 Memorial and Museum have dubbed it “the Angel of 9/11.”

“You can see the face clear as day, as if it’s looking down at a sacred spot. The workers call it the Angel of 9/11,” one visitor told The Sun.

Formed within a twisted steel girder, the mangled piece of metal in which the face has appeared is called Impact Steel.

It was taken from the spot where the American Airlines Flight 11 struck the North Tower at 8.46 a.m. on Sept. 11 2001.

After the attack, salts, oxides and moisture on the steel’s surface affected how the girder corroded, P. Chris Pistorius, a materials scientist at Carnegie Mellon University who is co-director of the Center for Iron and Steelmaking Research, told NBC News.

“Atmospheric corrosion is very sensitive to microclimates,” he added to NBC News. “It’s actually difficult to get even corrosion of such a surface. It’s more likely to get a pattern than to get uniform corrosion.”

If layers of steel are lying on top of each other, moisture can “wick in different areas and leave all kinds of different patterns,” said Thomas Eagar, a professor of materials engineering at the Massachusetts Institute of Technology, to NBC News.

A spokesman for the museum said: “People often find meaning in tragedy. For us, this piece of steel is historically important to include in the museum as it helps to tell the story of 9/11,” according to NBC News.

It is housed in the museum, which also houses a crushed fire engine used on the day of the attacks.

The museum is due to open in spring next year.