September 11 attacks (2001)
Companies in the World Trade Center lost servers, records, and operations when the towers fell. Firms without off-site backups lost data permanently; others recovered from tape archives stored elsewhere.
The disaster pushed businesses to adopt off-site backup and geographic redundancy as standard practice.
Disaster recovery and business continuity became formal disciplines with dedicated vendors and standards.
The 9/11 lesson was about replicating data off-site. AWS's Gulf loss shows the limits of that approach: backups kept in the same war zone can be destroyed alongside primary systems, forcing true cross-region strategies.
