(Between 10:00 a.m. and 11:00 a.m. September 11, 2001): Ground Zero Dust Sample Contains 4.5 Percent Asbestos
A dust sample is taken by EPA employees as they flee the collapsing buildings. The samples are later tested and found to contain an asbestos level of 4.5 percent. [Newsweek, 9/14/2001; Star Tribune (Minneapolis), 9/14/2001]