1. TSMC dispatched 500+ experienced technicians from Taiwan to train U.S. workers at its Arizona fab, sparking criticism from local unions over foreign labor practices; 2. The $40B Phoenix complex plans 4nm chip production by 2025, potentially receiving $6-7B in CHIPS Act subsidies; 3. Workforce shortages and geopolitical complexities continue to challenge TSMC's first major U.S. advanced chipmaking project.