feet from where Rescorla and Hill had predicted. Following the 1993 bombing, Rescorla invited Hill to New York, where he hired him as a security consultant in order to analyze the building's security. Although no arrests had yet been made in the case, Rescorla suspected that the bomb had been planted by Muslim terrorists, probably Palestinians, or that an Iraqi colonel of engineers might have orchestrated the attack. Hill let his beard grow and visited several mosques in New Jersey, showing up for morning prayers at dawn. Speaking fluent Arabic, he took on the character of an anti-American Muslim in order to infiltrate and interview the other visitors to the mosques. He concluded that the attack was likely planned by a radical imam at a mosque in New York or New Jersey. Subsequently, followers of Sheikh Omar Abdel Rahman, a Brooklyn-based radical Muslim cleric, were convicted of the bombing. 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. After Dean Witter merged with Morgan Stanley in 1997, the company eventually occupied 22 floors in the South Tower and several floors in a building nearby. Rescorla's office was on the South Tower’s 44th floor. Feeling that the authorities lost legitimacy after they failed to respond to his 1990 warnings, he concluded that employees of Morgan Stanley, which was the largest tenant in the World Trade Center, could not rely on first responders in an emergency and needed to empower themselves through surprise fire drills, in which he trained employees to meet in the hallway between stairwells and go down the stairs two by two to the 44th floor. Rescorla's strict approach to these drills put