NEW YORK (CBSNewYork) — The terror threat is on the minds of traders at Wall Street on the last business day before the 9/11 anniversary.

Traders held an emotional observance Friday morning at the New York Stock Exchange.

There was a moment of silence just before the market opened to remember the victims of the terrorist attacks.

1010 WINS’ Juliet Papa reports: Emotional Day At NYSE

Dignitaries, including former New York City Mayor Rudy Giuliani, Secretary of State Hillary Clinton and Sen. Charles Schumer, rang the opening bell.

They joined other guests who were there to ring the opening bell on the morning of Sept. 17, 2001 — the first day the exchange reopened after the attacks.

Arthur Cashin, of UBS Financial Services, told 1010 WINS’ Juliet Papa he was in the towers that fateful morning 10 years ago.

“I was going to make a presentation to a group of CEOs and I went back to get some extra material,” he said.

Cashin said after the attacks, Wall Street raised $6 million in less than a week for the families of fallen firefighters.

Clinton said this latest terrorist threat against the city should not stop New Yorkers from going about their business.

“Part of the reason we go public with this information was to tell people, go on with your life, keep your eyes open, and let us know if you see anything suspicious,” Clinton said. “Remember, the Times Square bomber was stopped by a food vendor.”

Later Friday, family members of the stock exchange who lost loved ones on 9/11 will ring the closing bell.

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