Brian Clark (September 11 survivor)

After Flight 175 struck the South Tower, Clark and eight other employees of his floor who had survived the impact gathered together and started to descend Stairwell A. They only made it to the 81st floor when Clark and his group were met by a woman and a man coming up the stairs. The woman blocked their paths and warned them there were flames and smoke further down, and their only option was to try and go up to the roof in hope of being rescued from there.

Sixty-one of Clark's co-workers were killed in the incident. Clark was later appointed by his company's management to be President of the Euro Brokers Relief Fund, created to help take financial care of the families of those who were lost. He retired in 2006, a year after Euro Brokers merged with another company. Since his retirement, he has been volunteering with various non-profit organisations, including serving on the board and as treasurer of the New Brunswick Theological Seminary in New Jersey.

Clark and his coworkers stopped and debated on the stairwell landing about what to do next; whether to listen to the woman and go up the stairs or to ignore her warnings and go down the stairs. As the group stood there debating their next move, a faint scream for help coming from inside the 81st floor caught Clark's attention. While his group continued to debate what to do, Clark grabbed coworker Ron DiFrancesco and entered the 81st floor to look for the person screaming for help. As Clark and DiFrancesco entered the floor, Clark turned around to observe his coworkers as they started to go up the stairs to the roof instead of down. That group would all lose their lives that day, as access doors to the roof were locked, and there were no plans for helicopter rescues from the roof, as the NYPD deemed it too unsafe to attempt due to dense clouds of smoke and rooftop antennas.

Praimnath had initially evacuated the building after the first plane had hit the North Tower but went back inside as South Tower security gave clearance to reenter the building. Once he had arrived back at his office on the 81st floor, he was on the phone when he noticed the second plane coming right at him. He screamed and jumped under his desk as the plane was hitting the building. After the impact, Praimnath found himself alive under his desk with only minor injuries. When Clark found Praimnath, there was a wall standing between the two, and the only way for Praimnath to escape was to jump up and go over the wall.

Brian Clark (born July 4, 1947) is a Canadian businessman and survivor of the attacks on the World Trade Center on September 11, 2001. Clark worked for the American international brokerage firm Euro Brokers Inc. (later merged into BGC Partners), which lost 61 employees that day, nearly one-fifth of its New York branch.

The phones were working in Oppenheimer's offices on the 31st floor. Clark was on the telephone for over three minutes and talked to three different people before his 911 call was understood. This call might have been the only chance for rescue workers to learn that there was a clear stairwell that the several hundred people trapped above the impact could try to use to escape. Clark described how he and Praimnath did not feel a sense of urgency, and before calling 911 they each made one brief personal call.