Disagreeing with his group's decision to retreat upstairs -- only DiFrancesco survived, and only then after running down from the 91st floor and getting out right before the South Tower fell -- Clark returned to Stairwell A. Shoulder to shoulder with Praimnath, the pair began the dangerous descent down the wet stairway.

CNN: An improbable escape

Juxtapose, for instance, why folks who are much more willing, for instance, to have, say, European immigrants - particularly of Irish descent -to do certain kind of dangerous jobs.

NPR: Embracing Freedom: Juneteenth Celebrations