Saladin rose from obscurity to become the Sultan who united Egypt and Syria. He survived assassination attempts, crushed internal rivals, and declared a holy struggle to reclaim Jerusalem. After ...

Abstract: Cleaning tasks for vertical structures, such as building façades and walls on construction sites, are dangerous; there is a high risk of fall accidents among workers engaged in such tasks.

In the shadowy haze of the 12th-century Middle East, where crusader kingdoms and Islamic empires clashed over territory, faith, and supremacy, few figures rose as luminously as Salah ad-Din Yusuf ibn ...