Analysis of information sources in references of the Wikipedia article "Brian Clark (September 11 survivor)" in English language version.
Brian Clark.
Other ordinary citizens simply rose to the occasion. Brian Clark, a vice-president for a brokerage firm, heard someone call for help as he struggled down the stairway and found Stanley Praimnath trapped behind a pile of heavy debris.
Meanwhile, Brian Clark had just made it as far as the stairwell outside the 81st floor where he heard Stanley's cries for help. In spite of his vulnerability to dust and smoke because of his asthma and allergies, the broker entered that floor and went to work to free the man trapped in the rubble.
