Simplify the following text for a Grade 11 native English-speaking person.
Original: Louis Haefliger prevented the forceful eviction or blasting of Mauthausen-Gusen by alerting American troops , thereby saving the lives of about 60,000 inmates .
Simplified: Louis Haefliger told American troops about the forceful eviction or blasting of Mauthausen-Gusen and saved the lives of about 60,000 inmates .