How does the author's description of the ritual many people perform before going into the "hot zone" build suspense?

The author highlights the power of superstition in the face of fear. The scientists who work with hot agents are highly-trained individuals who understand that a break in their space suit will likely lead to exposure and death. Yet, at the same time, these well-educated men and women revert to ritual and superstition in order to find the courage to continue their work. While an amulet will not actually protect anyone from infection, such superstitions provide emotional safeguards that are necessary for the scientists to overcome their fears. This adds to the suspense of the unknown and danger of the situation even though these men and women are highly educated.