Understanding DR as "backup in place" is SAA level. Pro requires RTO (Recovery Time Objective, target recovery time) and RPO (Recovery Point Objective, allowed data loss window) defined by business, then designing cost-efficient DR strategy to meet those numbers. AWS provides four strategies (Backup/Restore, Pilot Light, Warm Standby, Multi-Site) and auto-validation tools (Resilience Hub, FIS, DRS, Route 53 ARC). Today we consolidate Week 14's entire DR into one scenario.