الرئيسيةموسوعة الفيديوسدود و ابارBuilding the Hoover Dam | The B1M
سدود و ابار

Building the Hoover Dam | The B1M

The incredible construction story behind the Hoover Dam – a 1930s infrastructure project that now provides water and electricity to millions across the south western United States. For more by The B1M subscribe now