Rescorla anticipated attacks on the towers and implemented evacuation procedures that were credited with saving thousands of lives. He died during the attacks of September 11, 2001, going back to help evacuate more people in the South Tower after he had organized the evacuation of the Morgan Stanley offices.
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Rescorla and Hill wrote a report to the Port Authority of New York and New Jersey, which owns the site, insisting on the need for more security in the parking garage. Their recommendations, which would have been expensive to implement, were ignored, according to James B. Stewart's biography of Rescorla, Heart of a Soldier. In the 1993 World Trade Center bombing, terrorists would detonate a truck bomb 30 feet from where Rescorla and Hill had predicted.
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Rescorla gained credibility and authority after the bombing, which resulted in a change to the culture of Morgan Stanley. Rescorla wanted the company out of the building because he continued to feel, as did Hill, that the World Trade Center was still a target for terrorists and that the next attack could involve a plane crashing into one of the towers. He recommended to his superiors at Morgan Stanley that the company leave Manhattan office space, mentioning that labor costs were lower in New Jersey and that the firm's employees and equipment would be safer in a proposed four-story building. However, this recommendation was not followed because the company's lease at the World Trade Center would not terminate until 2006. At Rescorla's insistence, all employees (including senior executives) then practiced emergency evacuations every three months.
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While watching the news coverage, in a phone call to his best friend, Dan Hill, Rescorla said, "The dumb sons of bitches told me not to evacuate," and, "They said it's just Building One. I told them I'm getting my people the fuck out of here."
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Rescorla called his wife, telling her, "Stop crying. I have to get these people out safely. If something should happen to me, I want you to know I've never been happier. You made my life,"