Complex sentence: For example, there are reports that 15 cargo ships are linked to al-Qaeda, whose activities at port might draw the attention of security officials, or even low-level dockworkers or craftsmen.
Split into simpler sentences: For example, there are reports that 15 cargo ships are linked to al-Qaeda. The activities of those ships at port might draw the attention of security officials, or even low-level dockworkers or craftsmen.